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

研究成果: Article査読

94 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号152501
ジャーナルApplied Physics Letters
98
15
DOI
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)

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