Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves
We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements we...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Matthes, Patrick [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Schlagwörter: |
perpendicular magnetic anisotropy perpendicular pseudospin valves |
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| Übergeordnetes Werk: |
Enthalten in: IEEE transactions on magnetics - New York, NY : IEEE, 1965, 51(2015), 1, Seite 1-4 |
|---|---|
| Übergeordnetes Werk: |
volume:51 ; year:2015 ; number:1 ; pages:1-4 |
| Links: |
|---|
| DOI / URN: |
10.1109/TMAG.2014.2359871 |
|---|
| Katalog-ID: |
OLC1966669844 |
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| 520 | |a We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. | ||
| 650 | 4 | |a Magnetic hysteresis | |
| 650 | 4 | |a spin valves | |
| 650 | 4 | |a current-in-plane geometry | |
| 650 | 4 | |a Temperature measurement | |
| 650 | 4 | |a cobalt | |
| 650 | 4 | |a van der Pauw method | |
| 650 | 4 | |a copper | |
| 650 | 4 | |a magnetisation reversal | |
| 650 | 4 | |a (Pt-Co)-Cu-(Co-Pt) | |
| 650 | 4 | |a Magnetostatics | |
| 650 | 4 | |a Magnetic domains | |
| 650 | 4 | |a spacer layer thickness | |
| 650 | 4 | |a magnetotransport | |
| 650 | 4 | |a magnetostatic interactions | |
| 650 | 4 | |a four point probe method | |
| 650 | 4 | |a perpendicular magnetic anisotropy | |
| 650 | 4 | |a platinum | |
| 650 | 4 | |a perpendicular pseudospin valves | |
| 650 | 4 | |a Magnetic multilayers | |
| 650 | 4 | |a GMR effect | |
| 650 | 4 | |a vertically correlated magnetic domains | |
| 650 | 4 | |a giant magnetoresistance | |
| 650 | 4 | |a magnetic reversal | |
| 650 | 4 | |a Magnetoresistance | |
| 650 | 4 | |a Anisotropy | |
| 650 | 4 | |a Magnetic properties | |
| 650 | 4 | |a Cobalt | |
| 650 | 4 | |a Analysis | |
| 650 | 4 | |a Copper | |
| 650 | 4 | |a Usage | |
| 650 | 4 | |a Thermal properties | |
| 700 | 1 | |a Arekapudi, Sri Sai Phani Kanth |4 oth | |
| 700 | 1 | |a Timmermann, Felix |4 oth | |
| 700 | 1 | |a Albrecht, Manfred |4 oth | |
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10.1109/TMAG.2014.2359871 doi PQ20160617 (DE-627)OLC1966669844 (DE-599)GBVOLC1966669844 (PRQ)c2479-83d29bdfc913e37c3f634afe11143770d2b2124c842ae97bb72619055e8081ff0 (KEY)0061452120150000051000100001magnetotransportpropertiesofperpendicularptcocucop DE-627 ger DE-627 rakwb eng 620 DNB 33.75 bkl 33.16 bkl Matthes, Patrick verfasserin aut Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties Arekapudi, Sri Sai Phani Kanth oth Timmermann, Felix oth Albrecht, Manfred oth Enthalten in IEEE transactions on magnetics New York, NY : IEEE, 1965 51(2015), 1, Seite 1-4 (DE-627)129602078 (DE-600)241508-2 (DE-576)015095789 0018-9464 nnns volume:51 year:2015 number:1 pages:1-4 http://dx.doi.org/10.1109/TMAG.2014.2359871 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7029253 http://search.proquest.com/docview/1684186542 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 33.75 AVZ 33.16 AVZ AR 51 2015 1 1-4 |
| spelling |
10.1109/TMAG.2014.2359871 doi PQ20160617 (DE-627)OLC1966669844 (DE-599)GBVOLC1966669844 (PRQ)c2479-83d29bdfc913e37c3f634afe11143770d2b2124c842ae97bb72619055e8081ff0 (KEY)0061452120150000051000100001magnetotransportpropertiesofperpendicularptcocucop DE-627 ger DE-627 rakwb eng 620 DNB 33.75 bkl 33.16 bkl Matthes, Patrick verfasserin aut Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties Arekapudi, Sri Sai Phani Kanth oth Timmermann, Felix oth Albrecht, Manfred oth Enthalten in IEEE transactions on magnetics New York, NY : IEEE, 1965 51(2015), 1, Seite 1-4 (DE-627)129602078 (DE-600)241508-2 (DE-576)015095789 0018-9464 nnns volume:51 year:2015 number:1 pages:1-4 http://dx.doi.org/10.1109/TMAG.2014.2359871 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7029253 http://search.proquest.com/docview/1684186542 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 33.75 AVZ 33.16 AVZ AR 51 2015 1 1-4 |
| allfields_unstemmed |
10.1109/TMAG.2014.2359871 doi PQ20160617 (DE-627)OLC1966669844 (DE-599)GBVOLC1966669844 (PRQ)c2479-83d29bdfc913e37c3f634afe11143770d2b2124c842ae97bb72619055e8081ff0 (KEY)0061452120150000051000100001magnetotransportpropertiesofperpendicularptcocucop DE-627 ger DE-627 rakwb eng 620 DNB 33.75 bkl 33.16 bkl Matthes, Patrick verfasserin aut Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties Arekapudi, Sri Sai Phani Kanth oth Timmermann, Felix oth Albrecht, Manfred oth Enthalten in IEEE transactions on magnetics New York, NY : IEEE, 1965 51(2015), 1, Seite 1-4 (DE-627)129602078 (DE-600)241508-2 (DE-576)015095789 0018-9464 nnns volume:51 year:2015 number:1 pages:1-4 http://dx.doi.org/10.1109/TMAG.2014.2359871 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7029253 http://search.proquest.com/docview/1684186542 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 33.75 AVZ 33.16 AVZ AR 51 2015 1 1-4 |
| allfieldsGer |
10.1109/TMAG.2014.2359871 doi PQ20160617 (DE-627)OLC1966669844 (DE-599)GBVOLC1966669844 (PRQ)c2479-83d29bdfc913e37c3f634afe11143770d2b2124c842ae97bb72619055e8081ff0 (KEY)0061452120150000051000100001magnetotransportpropertiesofperpendicularptcocucop DE-627 ger DE-627 rakwb eng 620 DNB 33.75 bkl 33.16 bkl Matthes, Patrick verfasserin aut Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties Arekapudi, Sri Sai Phani Kanth oth Timmermann, Felix oth Albrecht, Manfred oth Enthalten in IEEE transactions on magnetics New York, NY : IEEE, 1965 51(2015), 1, Seite 1-4 (DE-627)129602078 (DE-600)241508-2 (DE-576)015095789 0018-9464 nnns volume:51 year:2015 number:1 pages:1-4 http://dx.doi.org/10.1109/TMAG.2014.2359871 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7029253 http://search.proquest.com/docview/1684186542 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 33.75 AVZ 33.16 AVZ AR 51 2015 1 1-4 |
| allfieldsSound |
10.1109/TMAG.2014.2359871 doi PQ20160617 (DE-627)OLC1966669844 (DE-599)GBVOLC1966669844 (PRQ)c2479-83d29bdfc913e37c3f634afe11143770d2b2124c842ae97bb72619055e8081ff0 (KEY)0061452120150000051000100001magnetotransportpropertiesofperpendicularptcocucop DE-627 ger DE-627 rakwb eng 620 DNB 33.75 bkl 33.16 bkl Matthes, Patrick verfasserin aut Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties Arekapudi, Sri Sai Phani Kanth oth Timmermann, Felix oth Albrecht, Manfred oth Enthalten in IEEE transactions on magnetics New York, NY : IEEE, 1965 51(2015), 1, Seite 1-4 (DE-627)129602078 (DE-600)241508-2 (DE-576)015095789 0018-9464 nnns volume:51 year:2015 number:1 pages:1-4 http://dx.doi.org/10.1109/TMAG.2014.2359871 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7029253 http://search.proquest.com/docview/1684186542 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_170 33.75 AVZ 33.16 AVZ AR 51 2015 1 1-4 |
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Matthes, Patrick |
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Matthes, Patrick ddc 620 bkl 33.75 bkl 33.16 misc Magnetic hysteresis misc spin valves misc current-in-plane geometry misc Temperature measurement misc cobalt misc van der Pauw method misc copper misc magnetisation reversal misc (Pt-Co)-Cu-(Co-Pt) misc Magnetostatics misc Magnetic domains misc spacer layer thickness misc magnetotransport misc magnetostatic interactions misc four point probe method misc perpendicular magnetic anisotropy misc platinum misc perpendicular pseudospin valves misc Magnetic multilayers misc GMR effect misc vertically correlated magnetic domains misc giant magnetoresistance misc magnetic reversal misc Magnetoresistance misc Anisotropy misc Magnetic properties misc Cobalt misc Analysis misc Copper misc Usage misc Thermal properties Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves |
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620 DNB 33.75 bkl 33.16 bkl Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves Magnetic hysteresis spin valves current-in-plane geometry Temperature measurement cobalt van der Pauw method copper magnetisation reversal (Pt-Co)-Cu-(Co-Pt) Magnetostatics Magnetic domains spacer layer thickness magnetotransport magnetostatic interactions four point probe method perpendicular magnetic anisotropy platinum perpendicular pseudospin valves Magnetic multilayers GMR effect vertically correlated magnetic domains giant magnetoresistance magnetic reversal Magnetoresistance Anisotropy Magnetic properties Cobalt Analysis Copper Usage Thermal properties |
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ddc 620 bkl 33.75 bkl 33.16 misc Magnetic hysteresis misc spin valves misc current-in-plane geometry misc Temperature measurement misc cobalt misc van der Pauw method misc copper misc magnetisation reversal misc (Pt-Co)-Cu-(Co-Pt) misc Magnetostatics misc Magnetic domains misc spacer layer thickness misc magnetotransport misc magnetostatic interactions misc four point probe method misc perpendicular magnetic anisotropy misc platinum misc perpendicular pseudospin valves misc Magnetic multilayers misc GMR effect misc vertically correlated magnetic domains misc giant magnetoresistance misc magnetic reversal misc Magnetoresistance misc Anisotropy misc Magnetic properties misc Cobalt misc Analysis misc Copper misc Usage misc Thermal properties |
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ddc 620 bkl 33.75 bkl 33.16 misc Magnetic hysteresis misc spin valves misc current-in-plane geometry misc Temperature measurement misc cobalt misc van der Pauw method misc copper misc magnetisation reversal misc (Pt-Co)-Cu-(Co-Pt) misc Magnetostatics misc Magnetic domains misc spacer layer thickness misc magnetotransport misc magnetostatic interactions misc four point probe method misc perpendicular magnetic anisotropy misc platinum misc perpendicular pseudospin valves misc Magnetic multilayers misc GMR effect misc vertically correlated magnetic domains misc giant magnetoresistance misc magnetic reversal misc Magnetoresistance misc Anisotropy misc Magnetic properties misc Cobalt misc Analysis misc Copper misc Usage misc Thermal properties |
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ddc 620 bkl 33.75 bkl 33.16 misc Magnetic hysteresis misc spin valves misc current-in-plane geometry misc Temperature measurement misc cobalt misc van der Pauw method misc copper misc magnetisation reversal misc (Pt-Co)-Cu-(Co-Pt) misc Magnetostatics misc Magnetic domains misc spacer layer thickness misc magnetotransport misc magnetostatic interactions misc four point probe method misc perpendicular magnetic anisotropy misc platinum misc perpendicular pseudospin valves misc Magnetic multilayers misc GMR effect misc vertically correlated magnetic domains misc giant magnetoresistance misc magnetic reversal misc Magnetoresistance misc Anisotropy misc Magnetic properties misc Cobalt misc Analysis misc Copper misc Usage misc Thermal properties |
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magnetotransport properties of perpendicular [pt/co]/cu/[co/pt] pseudo-spin-valves |
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Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves |
| abstract |
We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. |
| abstractGer |
We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. |
| abstract_unstemmed |
We studied the giant magnetoresistance (GMR) effect in [Co/Pt] 4 /Co/Cu/Co/[Co/Pt] 4 pseudo-spin-valves with perpendicular magnetic anisotropy (PMA) and analyzed the impact of the Cu spacer layer thickness as well as the Co layer thickness at the Cu/Co interface. The magnetotransport measurements were carried out by a four-point probe method in current-in-plane geometry at room temperature and additionally by the van der Pauw method at low temperatures. The GMR ratio at room temperature can be almost doubled to ~1.5% by increasing the Co layer thickness to 10 Å at each side of the Cu spacer layer, while keeping all other thicknesses constant. Due to this relatively large single Co layer thickness, which reduces the perpendicular magnetic anisotropy, the magnetic reversal is driven by magnetostatic interactions, leading to the formation of vertically correlated magnetic domains. In addition, by tuning the PMA of both [Co/Pt] multilayers, the formation of magnetic domains in the soft layer can be achieved without affecting the hard layer, which stays uniformly magnetized, resulting in a GMR ratio of up to 1.6% at room temperature. Upon formation of vertically correlated domains, the GMR ratio will be reduced again. |
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Magnetotransport Properties of Perpendicular [Pt/Co]/Cu/[Co/Pt] Pseudo-Spin-Valves |
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Arekapudi, Sri Sai Phani Kanth Timmermann, Felix Albrecht, Manfred |
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