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


研究成果: Article査読

20 被引用数 (Scopus)


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.

ジャーナルJournal of Applied Physics
出版ステータスPublished - 2010 11月 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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