Bulk and interfacial scatterings in current-perpendicular-to-plane giant magnetoresistance with Co2Fe (Al0.5Si0.5) Heusler alloy layers and Ag spacer

T. M. Nakatani, T. Furubayashi, S. Kasai, H. Sukegawa, Y. K. Takahashi, S. Mitani, K. Hono

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123 Citations (Scopus)

Abstract

We report the transport properties of a current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) device with Co2Fe (Al0.5 Si0.5) (CFAS) Heusler alloy ferromagnetic layers and a Ag spacer layer. The CPP-GMR devices showed relatively high ΔRA values and MR ratios up to 17 m μ m2 and 80% at 14 K, and 8 m μ m2 and 34% at 290 K. The spin diffusion length ∼3 nm and the bulk spin asymmetry ∼0.77 for the CFAS alloy at 14 K were estimated by the Valet-Fert model, indicating a large contribution of the interfacial scattering.

Original languageEnglish
Article number212501
JournalApplied Physics Letters
Volume96
Issue number21
DOIs
Publication statusPublished - 2010 May 24
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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