Large magnetoresistance in current-perpendicular-to-plane pseudospin valve using a Co2 Fe (Ge0.5 Ga0.5) Heusler alloy

Y. K. Takahashi; A. Srinivasan; B. Varaprasad; A. Rajanikanth; N. Hase; T. M. Nakatani; S. Kasai; T. Furubayashi; K. Hono

doi:10.1063/1.3576923

Large magnetoresistance in current-perpendicular-to-plane pseudospin valve using a Co₂ Fe (Ge_0.5 Ga_0.5) Heusler alloy

Y. K. Takahashi, A. Srinivasan, B. Varaprasad, A. Rajanikanth, N. Hase, T. M. Nakatani, S. Kasai, T. Furubayashi, K. Hono

研究成果: Article › 査読

96 被引用数 (Scopus)

抄録

Using a newly developed highly spin-polarized Heusler alloy, Co₂ Fe (Ga_0.5 Ge_0.5) (CFGG), as ferromagnetic layers, we have fabricated a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (Δ_RA) of 9.5 m μ m ² and magnetoresistance (MR) ratio (100×ΔR/R) of 41.7% at 300 K. These values were further enhanced to Δ R A=26.4 m μ m ² and MR=129.1% at 10 K. The large MR values are attributed to the high spin polarization of the CFGG alloy confirmed by point contact Andreev reflection measurements.

本文言語	English
論文番号	152501
ジャーナル	Applied Physics Letters
巻	98
号	15
DOI	https://doi.org/10.1063/1.3576923
出版ステータス	Published - 2011 4月 11
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（その他）

文献へのアクセス

10.1063/1.3576923

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引用スタイル

@article{06a66b44a8c44653b28e3206ae98e2a5,

title = "Large magnetoresistance in current-perpendicular-to-plane pseudospin valve using a Co2 Fe (Ge0.5 Ga0.5) Heusler alloy",

abstract = "Using a newly developed highly spin-polarized Heusler alloy, Co2 Fe (Ga0.5 Ge0.5) (CFGG), as ferromagnetic layers, we have fabricated a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (ΔRA) of 9.5 m μ m 2 and magnetoresistance (MR) ratio (100×ΔR/R) of 41.7% at 300 K. These values were further enhanced to Δ R A=26.4 m μ m 2 and MR=129.1% at 10 K. The large MR values are attributed to the high spin polarization of the CFGG alloy confirmed by point contact Andreev reflection measurements.",

author = "Takahashi, {Y. K.} and A. Srinivasan and B. Varaprasad and A. Rajanikanth and N. Hase and Nakatani, {T. M.} and S. Kasai and T. Furubayashi and K. Hono",

note = "Funding Information: This work was supported in part by PREST-JST and by Grant-in-Aids for Scientific Research (A) and (B) (Grant Nos. 22246091 and 20360322).",

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T1 - Large magnetoresistance in current-perpendicular-to-plane pseudospin valve using a Co2 Fe (Ge0.5 Ga0.5) Heusler alloy

AU - Takahashi, Y. K.

AU - Srinivasan, A.

AU - Varaprasad, B.

AU - Rajanikanth, A.

AU - Hase, N.

AU - Nakatani, T. M.

AU - Kasai, S.

AU - Furubayashi, T.

AU - Hono, K.

N1 - Funding Information: This work was supported in part by PREST-JST and by Grant-in-Aids for Scientific Research (A) and (B) (Grant Nos. 22246091 and 20360322).

PY - 2011/4/11

Y1 - 2011/4/11

N2 - Using a newly developed highly spin-polarized Heusler alloy, Co2 Fe (Ga0.5 Ge0.5) (CFGG), as ferromagnetic layers, we have fabricated a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (ΔRA) of 9.5 m μ m 2 and magnetoresistance (MR) ratio (100×ΔR/R) of 41.7% at 300 K. These values were further enhanced to Δ R A=26.4 m μ m 2 and MR=129.1% at 10 K. The large MR values are attributed to the high spin polarization of the CFGG alloy confirmed by point contact Andreev reflection measurements.

AB - Using a newly developed highly spin-polarized Heusler alloy, Co2 Fe (Ga0.5 Ge0.5) (CFGG), as ferromagnetic layers, we have fabricated a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (ΔRA) of 9.5 m μ m 2 and magnetoresistance (MR) ratio (100×ΔR/R) of 41.7% at 300 K. These values were further enhanced to Δ R A=26.4 m μ m 2 and MR=129.1% at 10 K. The large MR values are attributed to the high spin polarization of the CFGG alloy confirmed by point contact Andreev reflection measurements.

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