Current-perpendicular-to-plane spin valves with a Co2Mn (Ga 0.5Sn0.5) Heusler alloy

N. Hase*, B. S.D.Ch S. Varaprasad, T. M. Nakatani, H. Sukegawa, S. Kasai, Y. K. Takahashi, T. Furubayashi, K. Hono

*この研究の対応する著者

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Current-perpendicular-to-plane spin valves (SVs) with a new Heusler alloy of Co2 Mn (Ga0.5Sn0.5) (CMGS) as magnetic layers and an Ag spacer have been investigated. Magnetoresistance (MR) values of 8.8% and 17.2% and resistance change-area product (ΔRA) of 4.0 m μ m2 and 6.5 m μ m2 were measured at 300 K and 12 K, respectively. Transmission electron microscopy observations have revealed that the CMGS magnetic layer was ordered to the B2 structure for the SV annealed at 400 °C. Higher annealing temperature led to the degradation of the multilayer structure, resulting in lower MR and ΔRA values regardless of the L 21 structure of the CMGS layer. This suggests that MR properties may be enhanced further if the thermal stability of the multilayer structure is improved.

本文言語English
論文番号093916
ジャーナルJournal of Applied Physics
108
9
DOI
出版ステータスPublished - 2010 11 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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