Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices
Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not...
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| Autor*in: |
Maltoni, Pierfrancesco [verfasserIn] López-Martín, Raúl [verfasserIn] Sánchez, Elena H. [verfasserIn] Normile, Peter S. [verfasserIn] Vasilakaki, Marianna [verfasserIn] Lee, Su Seong [verfasserIn] Burgos, Benito Santos [verfasserIn] del Castillo, Eloy A. López [verfasserIn] Peddis, Davide [verfasserIn] Binns, Chris [verfasserIn] Trohidou, Kalliopi [verfasserIn] Mathieu, Roland [verfasserIn] Nogués, Josep [verfasserIn] De Toro, José A. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2024 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2024 |
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| Übergeordnetes Werk: |
Enthalten in: Advanced composites and hybrid materials - Springer International Publishing, 2017, 7(2024), 5 vom: Okt. |
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| Übergeordnetes Werk: |
volume:7 ; year:2024 ; number:5 ; month:10 |
| Links: |
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| DOI / URN: |
10.1007/s42114-024-00972-w |
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| Katalog-ID: |
SPR057805288 |
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| 520 | |a Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. | ||
| 650 | 4 | |a Magnetic nanocomposites |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Nanoparticles |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Magnetic properties |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Exchange bias |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a López-Martín, Raúl |e verfasserin |4 aut | |
| 700 | 1 | |a Sánchez, Elena H. |e verfasserin |4 aut | |
| 700 | 1 | |a Normile, Peter S. |e verfasserin |4 aut | |
| 700 | 1 | |a Vasilakaki, Marianna |e verfasserin |4 aut | |
| 700 | 1 | |a Lee, Su Seong |e verfasserin |4 aut | |
| 700 | 1 | |a Burgos, Benito Santos |e verfasserin |4 aut | |
| 700 | 1 | |a del Castillo, Eloy A. López |e verfasserin |4 aut | |
| 700 | 1 | |a Peddis, Davide |e verfasserin |4 aut | |
| 700 | 1 | |a Binns, Chris |e verfasserin |4 aut | |
| 700 | 1 | |a Trohidou, Kalliopi |e verfasserin |4 aut | |
| 700 | 1 | |a Mathieu, Roland |e verfasserin |4 aut | |
| 700 | 1 | |a Nogués, Josep |e verfasserin |4 aut | |
| 700 | 1 | |a De Toro, José A. |e verfasserin |4 aut | |
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10.1007/s42114-024-00972-w doi (DE-627)SPR057805288 (SPR)s42114-024-00972-w-e DE-627 ger DE-627 rakwb eng 620 VZ 620 VZ Maltoni, Pierfrancesco verfasserin aut Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2024 Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 López-Martín, Raúl verfasserin aut Sánchez, Elena H. verfasserin aut Normile, Peter S. verfasserin aut Vasilakaki, Marianna verfasserin aut Lee, Su Seong verfasserin aut Burgos, Benito Santos verfasserin aut del Castillo, Eloy A. López verfasserin aut Peddis, Davide verfasserin aut Binns, Chris verfasserin aut Trohidou, Kalliopi verfasserin aut Mathieu, Roland verfasserin aut Nogués, Josep verfasserin aut De Toro, José A. verfasserin aut Enthalten in Advanced composites and hybrid materials Springer International Publishing, 2017 7(2024), 5 vom: Okt. (DE-627)1004720920 (DE-600)2911408-1 2522-0136 nnns volume:7 year:2024 number:5 month:10 https://dx.doi.org/10.1007/s42114-024-00972-w X:SPRINGER Resolving-System kostenfrei Volltext SYSFLAG_0 GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_72 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_266 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2574 GBV_ILN_4029 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4116 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4155 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4315 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 7 2024 5 10 |
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10.1007/s42114-024-00972-w doi (DE-627)SPR057805288 (SPR)s42114-024-00972-w-e DE-627 ger DE-627 rakwb eng 620 VZ 620 VZ Maltoni, Pierfrancesco verfasserin aut Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2024 Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 López-Martín, Raúl verfasserin aut Sánchez, Elena H. verfasserin aut Normile, Peter S. verfasserin aut Vasilakaki, Marianna verfasserin aut Lee, Su Seong verfasserin aut Burgos, Benito Santos verfasserin aut del Castillo, Eloy A. López verfasserin aut Peddis, Davide verfasserin aut Binns, Chris verfasserin aut Trohidou, Kalliopi verfasserin aut Mathieu, Roland verfasserin aut Nogués, Josep verfasserin aut De Toro, José A. verfasserin aut Enthalten in Advanced composites and hybrid materials Springer International Publishing, 2017 7(2024), 5 vom: Okt. (DE-627)1004720920 (DE-600)2911408-1 2522-0136 nnns volume:7 year:2024 number:5 month:10 https://dx.doi.org/10.1007/s42114-024-00972-w X:SPRINGER Resolving-System kostenfrei Volltext SYSFLAG_0 GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_72 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_266 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2574 GBV_ILN_4029 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4116 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4155 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4315 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 7 2024 5 10 |
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10.1007/s42114-024-00972-w doi (DE-627)SPR057805288 (SPR)s42114-024-00972-w-e DE-627 ger DE-627 rakwb eng 620 VZ 620 VZ Maltoni, Pierfrancesco verfasserin aut Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2024 Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 López-Martín, Raúl verfasserin aut Sánchez, Elena H. verfasserin aut Normile, Peter S. verfasserin aut Vasilakaki, Marianna verfasserin aut Lee, Su Seong verfasserin aut Burgos, Benito Santos verfasserin aut del Castillo, Eloy A. López verfasserin aut Peddis, Davide verfasserin aut Binns, Chris verfasserin aut Trohidou, Kalliopi verfasserin aut Mathieu, Roland verfasserin aut Nogués, Josep verfasserin aut De Toro, José A. verfasserin aut Enthalten in Advanced composites and hybrid materials Springer International Publishing, 2017 7(2024), 5 vom: Okt. (DE-627)1004720920 (DE-600)2911408-1 2522-0136 nnns volume:7 year:2024 number:5 month:10 https://dx.doi.org/10.1007/s42114-024-00972-w X:SPRINGER Resolving-System kostenfrei Volltext SYSFLAG_0 GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_72 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_266 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2574 GBV_ILN_4029 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4116 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4155 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4315 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 7 2024 5 10 |
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10.1007/s42114-024-00972-w doi (DE-627)SPR057805288 (SPR)s42114-024-00972-w-e DE-627 ger DE-627 rakwb eng 620 VZ 620 VZ Maltoni, Pierfrancesco verfasserin aut Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2024 Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 López-Martín, Raúl verfasserin aut Sánchez, Elena H. verfasserin aut Normile, Peter S. verfasserin aut Vasilakaki, Marianna verfasserin aut Lee, Su Seong verfasserin aut Burgos, Benito Santos verfasserin aut del Castillo, Eloy A. López verfasserin aut Peddis, Davide verfasserin aut Binns, Chris verfasserin aut Trohidou, Kalliopi verfasserin aut Mathieu, Roland verfasserin aut Nogués, Josep verfasserin aut De Toro, José A. verfasserin aut Enthalten in Advanced composites and hybrid materials Springer International Publishing, 2017 7(2024), 5 vom: Okt. (DE-627)1004720920 (DE-600)2911408-1 2522-0136 nnns volume:7 year:2024 number:5 month:10 https://dx.doi.org/10.1007/s42114-024-00972-w X:SPRINGER Resolving-System kostenfrei Volltext SYSFLAG_0 GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_72 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_266 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2574 GBV_ILN_4029 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4116 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4155 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4315 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 7 2024 5 10 |
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10.1007/s42114-024-00972-w doi (DE-627)SPR057805288 (SPR)s42114-024-00972-w-e DE-627 ger DE-627 rakwb eng 620 VZ 620 VZ Maltoni, Pierfrancesco verfasserin aut Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices 2024 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2024 Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 López-Martín, Raúl verfasserin aut Sánchez, Elena H. verfasserin aut Normile, Peter S. verfasserin aut Vasilakaki, Marianna verfasserin aut Lee, Su Seong verfasserin aut Burgos, Benito Santos verfasserin aut del Castillo, Eloy A. López verfasserin aut Peddis, Davide verfasserin aut Binns, Chris verfasserin aut Trohidou, Kalliopi verfasserin aut Mathieu, Roland verfasserin aut Nogués, Josep verfasserin aut De Toro, José A. verfasserin aut Enthalten in Advanced composites and hybrid materials Springer International Publishing, 2017 7(2024), 5 vom: Okt. (DE-627)1004720920 (DE-600)2911408-1 2522-0136 nnns volume:7 year:2024 number:5 month:10 https://dx.doi.org/10.1007/s42114-024-00972-w X:SPRINGER Resolving-System kostenfrei Volltext SYSFLAG_0 GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_72 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_266 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_2574 GBV_ILN_4029 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4116 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4155 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4315 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 7 2024 5 10 |
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Enthalten in Advanced composites and hybrid materials 7(2024), 5 vom: Okt. volume:7 year:2024 number:5 month:10 |
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Enthalten in Advanced composites and hybrid materials 7(2024), 5 vom: Okt. volume:7 year:2024 number:5 month:10 |
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Magnetic nanocomposites Nanoparticles Magnetic properties Exchange bias |
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Advanced composites and hybrid materials |
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Maltoni, Pierfrancesco @@aut@@ López-Martín, Raúl @@aut@@ Sánchez, Elena H. @@aut@@ Normile, Peter S. @@aut@@ Vasilakaki, Marianna @@aut@@ Lee, Su Seong @@aut@@ Burgos, Benito Santos @@aut@@ del Castillo, Eloy A. López @@aut@@ Peddis, Davide @@aut@@ Binns, Chris @@aut@@ Trohidou, Kalliopi @@aut@@ Mathieu, Roland @@aut@@ Nogués, Josep @@aut@@ De Toro, José A. @@aut@@ |
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2024-10-01T00:00:00Z |
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However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. 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| author |
Maltoni, Pierfrancesco |
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Maltoni, Pierfrancesco ddc 620 misc Magnetic nanocomposites misc Nanoparticles misc Magnetic properties misc Exchange bias Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices |
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620 VZ Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices Magnetic nanocomposites (dpeaa)DE-He213 Nanoparticles (dpeaa)DE-He213 Magnetic properties (dpeaa)DE-He213 Exchange bias (dpeaa)DE-He213 |
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ddc 620 misc Magnetic nanocomposites misc Nanoparticles misc Magnetic properties misc Exchange bias |
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ddc 620 misc Magnetic nanocomposites misc Nanoparticles misc Magnetic properties misc Exchange bias |
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ddc 620 misc Magnetic nanocomposites misc Nanoparticles misc Magnetic properties misc Exchange bias |
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Elektronische Aufsätze Aufsätze Elektronische Ressource |
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Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices |
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Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices |
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Maltoni, Pierfrancesco |
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Advanced composites and hybrid materials |
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Advanced composites and hybrid materials |
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Maltoni, Pierfrancesco López-Martín, Raúl Sánchez, Elena H. Normile, Peter S. Vasilakaki, Marianna Lee, Su Seong Burgos, Benito Santos del Castillo, Eloy A. López Peddis, Davide Binns, Chris Trohidou, Kalliopi Mathieu, Roland Nogués, Josep De Toro, José A. |
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Elektronische Aufsätze |
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Maltoni, Pierfrancesco |
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10.1007/s42114-024-00972-w |
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620 |
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verfasserin |
| title_sort |
non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: new possibilities for simple reference layers in magnetic devices |
| title_auth |
Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices |
| abstract |
Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. © The Author(s) 2024 |
| abstractGer |
Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. © The Author(s) 2024 |
| abstract_unstemmed |
Abstract Exchange bias has been extensively studied in both exchange-coupled thin films and nanoparticle composite systems. However, the role of non-exchange mechanisms in the overall hysteresis loop bias is far from being understood. Here, dense soft-hard binary nanoparticle composites are used not only as a novel tool to unravel the effect of dipolar interactions on the hysteresis loop shift but also as a new strategy to enhance the bias of any magnet exhibiting an asymmetric magnetization reversal. Mixtures of equally sized, 6.8 nm, soft maghemite (γ-$ Fe_{2} $$ O_{3} $) nanoparticles (no bias—symmetric reversal) and hard cobalt doped γ-$ Fe_{2} $$ O_{3} $ nanoparticles (large exchange bias—asymmetric reversal) reveal that, for certain fractions of soft particles, the loop shift of the composite can be significantly larger than the exchange-bias field of the hard particles in the mixture. Simple calculations indicate how this emerging phenomenon can be further enhanced by optimizing the parameters of the hard particles (coercivity and loop asymmetry). In addition, the existence of a dipolar-induced loop shift (“dipolar bias”) is demonstrated both experimentally and theoretically, where, for example, a bias is induced in the initially unbiased γ-$ Fe_{2} $$ O_{3} $ nanoparticles due to the dipolar interaction with the exchange-biased hard nanoparticles. These results open a new paradigm in the large field of hysteresis bias and pave the way for novel approaches to tune loop shifts in magnetic hybrid systems beyond interface exchange coupling. © The Author(s) 2024 |
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Non-exchange bias hysteresis loop shifts in dense composites of soft-hard magnetic nanoparticles: New possibilities for simple reference layers in magnetic devices |
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López-Martín, Raúl Sánchez, Elena H. Normile, Peter S. Vasilakaki, Marianna Lee, Su Seong Burgos, Benito Santos del Castillo, Eloy A. López Peddis, Davide Binns, Chris Trohidou, Kalliopi Mathieu, Roland Nogués, Josep De Toro, José A. |
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| score |
7.401514 |