Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites
Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Pashchenko, V. P. [verfasserIn] Pashchenko, A. V. [verfasserIn] Prokopenko, V. K. [verfasserIn] Revenko, Yu. F. [verfasserIn] Shemyakov, A. A. [verfasserIn] Sil’cheva, A. G. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Technical physics - Berlin : Springer Science + Business Media, 1997, 57(2012), 11 vom: Nov., Seite 1508-1513 |
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| Übergeordnetes Werk: |
volume:57 ; year:2012 ; number:11 ; month:11 ; pages:1508-1513 |
| Links: |
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| DOI / URN: |
10.1134/S1063784212110217 |
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| Katalog-ID: |
SPR019771762 |
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| 245 | 1 | 0 | |a Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
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| 520 | |a Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. | ||
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| 650 | 4 | |a Perovskite Structure |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Cation Vacancy |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Anion Vacancy |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Ferro Magnetic |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Pashchenko, A. V. |e verfasserin |4 aut | |
| 700 | 1 | |a Prokopenko, V. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Revenko, Yu. F. |e verfasserin |4 aut | |
| 700 | 1 | |a Shemyakov, A. A. |e verfasserin |4 aut | |
| 700 | 1 | |a Sil’cheva, A. G. |e verfasserin |4 aut | |
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10.1134/S1063784212110217 doi (DE-627)SPR019771762 (SPR)S1063784212110217-e DE-627 ger DE-627 rakwb eng 530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Pashchenko, V. P. verfasserin aut Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 Pashchenko, A. V. verfasserin aut Prokopenko, V. K. verfasserin aut Revenko, Yu. F. verfasserin aut Shemyakov, A. A. verfasserin aut Sil’cheva, A. G. verfasserin aut Enthalten in Technical physics Berlin : Springer Science + Business Media, 1997 57(2012), 11 vom: Nov., Seite 1508-1513 (DE-627)311278795 (DE-600)2008502-3 1090-6525 nnns volume:57 year:2012 number:11 month:11 pages:1508-1513 https://dx.doi.org/10.1134/S1063784212110217 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-MAT SSG-OPC-ASE 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_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 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_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 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_2008 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_2070 GBV_ILN_2086 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_2116 GBV_ILN_2118 GBV_ILN_2119 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 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_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 33.00 ASE 31.00 ASE 50.30 ASE AR 57 2012 11 11 1508-1513 |
| spelling |
10.1134/S1063784212110217 doi (DE-627)SPR019771762 (SPR)S1063784212110217-e DE-627 ger DE-627 rakwb eng 530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Pashchenko, V. P. verfasserin aut Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 Pashchenko, A. V. verfasserin aut Prokopenko, V. K. verfasserin aut Revenko, Yu. F. verfasserin aut Shemyakov, A. A. verfasserin aut Sil’cheva, A. G. verfasserin aut Enthalten in Technical physics Berlin : Springer Science + Business Media, 1997 57(2012), 11 vom: Nov., Seite 1508-1513 (DE-627)311278795 (DE-600)2008502-3 1090-6525 nnns volume:57 year:2012 number:11 month:11 pages:1508-1513 https://dx.doi.org/10.1134/S1063784212110217 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-MAT SSG-OPC-ASE 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_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 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_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 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_2008 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_2070 GBV_ILN_2086 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_2116 GBV_ILN_2118 GBV_ILN_2119 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 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_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 33.00 ASE 31.00 ASE 50.30 ASE AR 57 2012 11 11 1508-1513 |
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10.1134/S1063784212110217 doi (DE-627)SPR019771762 (SPR)S1063784212110217-e DE-627 ger DE-627 rakwb eng 530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Pashchenko, V. P. verfasserin aut Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 Pashchenko, A. V. verfasserin aut Prokopenko, V. K. verfasserin aut Revenko, Yu. F. verfasserin aut Shemyakov, A. A. verfasserin aut Sil’cheva, A. G. verfasserin aut Enthalten in Technical physics Berlin : Springer Science + Business Media, 1997 57(2012), 11 vom: Nov., Seite 1508-1513 (DE-627)311278795 (DE-600)2008502-3 1090-6525 nnns volume:57 year:2012 number:11 month:11 pages:1508-1513 https://dx.doi.org/10.1134/S1063784212110217 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-MAT SSG-OPC-ASE 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_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 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_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 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_2008 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_2070 GBV_ILN_2086 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_2116 GBV_ILN_2118 GBV_ILN_2119 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 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_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 33.00 ASE 31.00 ASE 50.30 ASE AR 57 2012 11 11 1508-1513 |
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10.1134/S1063784212110217 doi (DE-627)SPR019771762 (SPR)S1063784212110217-e DE-627 ger DE-627 rakwb eng 530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Pashchenko, V. P. verfasserin aut Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 Pashchenko, A. V. verfasserin aut Prokopenko, V. K. verfasserin aut Revenko, Yu. F. verfasserin aut Shemyakov, A. A. verfasserin aut Sil’cheva, A. G. verfasserin aut Enthalten in Technical physics Berlin : Springer Science + Business Media, 1997 57(2012), 11 vom: Nov., Seite 1508-1513 (DE-627)311278795 (DE-600)2008502-3 1090-6525 nnns volume:57 year:2012 number:11 month:11 pages:1508-1513 https://dx.doi.org/10.1134/S1063784212110217 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-MAT SSG-OPC-ASE 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_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 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_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 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_2008 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_2070 GBV_ILN_2086 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_2116 GBV_ILN_2118 GBV_ILN_2119 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 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_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 33.00 ASE 31.00 ASE 50.30 ASE AR 57 2012 11 11 1508-1513 |
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10.1134/S1063784212110217 doi (DE-627)SPR019771762 (SPR)S1063784212110217-e DE-627 ger DE-627 rakwb eng 530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Pashchenko, V. P. verfasserin aut Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 Pashchenko, A. V. verfasserin aut Prokopenko, V. K. verfasserin aut Revenko, Yu. F. verfasserin aut Shemyakov, A. A. verfasserin aut Sil’cheva, A. G. verfasserin aut Enthalten in Technical physics Berlin : Springer Science + Business Media, 1997 57(2012), 11 vom: Nov., Seite 1508-1513 (DE-627)311278795 (DE-600)2008502-3 1090-6525 nnns volume:57 year:2012 number:11 month:11 pages:1508-1513 https://dx.doi.org/10.1134/S1063784212110217 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-MAT SSG-OPC-ASE 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_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 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_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 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_2008 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_2070 GBV_ILN_2086 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_2116 GBV_ILN_2118 GBV_ILN_2119 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 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_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 33.00 ASE 31.00 ASE 50.30 ASE AR 57 2012 11 11 1508-1513 |
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Enthalten in Technical physics 57(2012), 11 vom: Nov., Seite 1508-1513 volume:57 year:2012 number:11 month:11 pages:1508-1513 |
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Enthalten in Technical physics 57(2012), 11 vom: Nov., Seite 1508-1513 volume:57 year:2012 number:11 month:11 pages:1508-1513 |
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Manganite Perovskite Structure Cation Vacancy Anion Vacancy Ferro Magnetic |
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Pashchenko, V. P. @@aut@@ Pashchenko, A. V. @@aut@@ Prokopenko, V. K. @@aut@@ Revenko, Yu. F. @@aut@@ Shemyakov, A. A. @@aut@@ Sil’cheva, A. G. @@aut@@ |
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P.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2012</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. 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Pashchenko, V. P. |
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Pashchenko, V. P. ddc 530 bkl 33.00 bkl 31.00 bkl 50.30 misc Manganite misc Perovskite Structure misc Cation Vacancy misc Anion Vacancy misc Ferro Magnetic Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
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530 ASE 33.00 bkl 31.00 bkl 50.30 bkl Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites Manganite (dpeaa)DE-He213 Perovskite Structure (dpeaa)DE-He213 Cation Vacancy (dpeaa)DE-He213 Anion Vacancy (dpeaa)DE-He213 Ferro Magnetic (dpeaa)DE-He213 |
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ddc 530 bkl 33.00 bkl 31.00 bkl 50.30 misc Manganite misc Perovskite Structure misc Cation Vacancy misc Anion Vacancy misc Ferro Magnetic |
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ddc 530 bkl 33.00 bkl 31.00 bkl 50.30 misc Manganite misc Perovskite Structure misc Cation Vacancy misc Anion Vacancy misc Ferro Magnetic |
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ddc 530 bkl 33.00 bkl 31.00 bkl 50.30 misc Manganite misc Perovskite Structure misc Cation Vacancy misc Anion Vacancy misc Ferro Magnetic |
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Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
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Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
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Pashchenko, V. P. |
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Technical physics |
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Pashchenko, V. P. Pashchenko, A. V. Prokopenko, V. K. Revenko, Yu. F. Shemyakov, A. A. Sil’cheva, A. G. |
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Pashchenko, V. P. |
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10.1134/S1063784212110217 |
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effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ la_{0.7} %$ ca_{0.3} $)1 − x$ mn_{1 + x} %$ o_{3} $ perovskites |
| title_auth |
Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
| abstract |
Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. |
| abstractGer |
Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. |
| abstract_unstemmed |
Abstract Ceramic ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ samples are studied by X-ray diffraction, resistive, magnetic, 55Mn NMR, and magnetoresistance methods. The concentration changes of lattice parameter a of the cubic perovskite structure and its average ionic radius are in good agreement if the concentrations of anion and cation vacancies and nanostructured clusters with $ Mn^{2+} $ in the A positions increase with x. Phase transition temperatures Tms and Tc weakly depend on x, and the electrical resistivity and the activation energy decrease substantially with increasing x due to a change in the imperfection of the perovskite structure. An analysis of the broad asymmetric 55Mn NMR spectra of the samples indicate a high-frequency $ Mn^{3+} $↔ $ Mn^{4+} $ electron superexchange and nonuniform magnetic and valence states of these ions because of a nonuniform distribution of ions and defects, which decrease the amplitude resonance frequency with increasing x. The magnetoresistive (MR) effect near phase-transition temperatures Tms and Tc increases substantially with x and is caused by the effect of a magnetic field on the scattering of charge carriers by intracrystallite nanostructured heterogeneities of an imperfect perovskite structure. The second MR effect is located in the low-temperature range, is related to tunneling through mesostructural crystallite boundaries, and decreases weakly with increasing x. A correlation is found between the hyperstoichiometric manganese content, the imperfection of the perovskite structure, and the magnitude of the MR effect. |
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Effect of hyperstoichiometric manganese on the structure and transport, magnetic, and magnetoresistance properties of manganite-lanthanum ($ La_{0.7} %$ Ca_{0.3} $)1 − x$ Mn_{1 + x} %$ O_{3} $ perovskites |
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| score |
7.3999014 |