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

Y. K. Takahashi, N. Hase, M. Kodzuka, A. Itoh, T. Koganezawa, T. Furubayashi, S. Li, B. S.D.Ch S. Varaprasad, T. Ohkubo, K. Hono

研究成果: Article査読

32 被引用数 (Scopus)

抄録

We have investigated the structure and magnetoresistance of current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) pseudo spin valves (PSVs) using Co2Mn(Ga0.25Ge0.75) (CMGG) Heusler alloy ferromagnetic layers annealed at different temperatures. Relatively large ΔRA of 6.1 mΩμm2 and MR ratio of 40.2% were obtained in the CPP-PSV annealed at 400 °C. Annealing at higher than 400 °C led to a significant deterioration of MR outputs. Detailed structure analysis using transmission electron microscopy, three-dimensional atom probe, and synchrotron x-ray diffraction showed that the degradation of MR in the over-annealed sample was due to the increase of DO3 disorder in the CMGG layer, while the layered structure of the film is fully preserved.

本文言語English
論文番号223901
ジャーナルJournal of Applied Physics
113
22
DOI
出版ステータスPublished - 2013 6 14
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

「Structure and magnetoresistance of current-perpendicular-to-plane 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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