Polycrystalline current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves using Co2Mn(Ga0.25Ge0.75) Heusler alloy

Ye Du, T. M. Nakatani, Y. K. Takahashi, N. Hase, T. Furubayashi, K. Hono

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We have studied the structure and magnetoresistive properties of polycrystalline current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves (PSVs) with Co2Mn(Ga0.25Ge0.75) (CMGG) ferromagnetic layers and a Ag spacer. With (110) textured CMGG thin films and (111) textured Ag spacer, the PSVs annealed at 350 °C with 2 nm CoFe buffer layers showed ΔRA of 3.7 m Ω μ m 2 and MR ratio of 12.2%, while the PSVs without the buffer layer showed ΔRA of only 1.3 m Ω μ m 2. High angle angular dark field images showed that the drop of ΔRA by annealing was due to the deterioration of the multi-layer CMGG/Ag/CMGG structure. Energy-dispersive X-ray spectroscopy images further confirmed the interdiffusion between CMGG layer and the Ag layer outside the CMGG/Ag/CMGG trilayer. In addition, we discuss the difference in the magnetoresistive properties of polycrystalline and epitaxial PSVs.

本文言語English
論文番号053910
ジャーナルJournal of Applied Physics
114
5
DOI
出版ステータスPublished - 2013 8 7
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Polycrystalline current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves using Co<sub>2</sub>Mn(Ga<sub>0.25</sub>Ge<sub>0.75</sub>) Heusler alloy」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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