Structure and magnetoresistive properties of current-perpendicular-to-plane pseudo-spin valves using polycrystalline Co2fe-based heusler alloy films

T. M. Nakatani, Ye Du, 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

13 被引用数 (Scopus)

抄録

We report current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) of pseudo-spin valves (PSVs) with polycrystalline Co2Fe(Al 0.5Si0.5) (CFAS) and Co2Fe(Ga 0.5Ge0.5) (CFGG) Heusler alloy films. Strongly [0 1 1] textured polycrystalline Heusler alloy films grew on the Ta/Ru/Ag underlayer. Relatively large CPP-GMR values of ΔRA up to 4 mΩ μm2 and ΔR/R up to 10% were obtained with 5 nm thick Heusler alloy films and Ag spacer layer by annealing CFAS PSV at 450 C and CFGG PSV at 350 C. Transmission electron microscopy revealed a flat and sharp interface between the [0 1 1] textured CFAS layers and the [1 1 1] textured Ag spacer layer. Annealing above an optimal temperature for each PSV led to reductions in MR values as a result of the thickening of the spacer layer induced by the Ag diffusion from the outer Ag layers.

本文言語English
ページ(範囲)3695-3702
ページ数8
ジャーナルActa Materialia
61
10
DOI
出版ステータスPublished - 2013 6
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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「Structure and magnetoresistive properties of current-perpendicular-to-plane pseudo-spin valves using polycrystalline Co<sub>2</sub>fe-based heusler alloy films」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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