Output enhancement of spin-valve giant magnetoresistance in current-perpendicular-to-plane geometry

H. Yuasa, M. Yoshikawa, Y. Kamiguchi, K. Koi, H. Iwasaki, M. Takagishi, M. Sahashi

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Abstract

In this work, we present a suitable material for metal-based spin-valve in current-perpendicular-to-plane (CPP) geometry. The AΔR (A is the element size and ΔR is the change in resistance) was investigated for three kinds of free and pinned layers material, that is, Co 90Fe 10, Fe 50Co 50, and Fe 50Co 50 with half-atomic Cu layers. When the free and pinned layers are 5 nm, AΔR is 1.0 mμm 2, 1.6 mμm 2, and 2.9 mμm 2, respectively. Moreover, the dual-type spin valve having Fe 50Co 50 with half-atomic Cu layers achieved 5.2 mμm 2. According to the free and pinned layers thickness dependence of AΔR, the spin-dependent resistance at the interfaces between ferromagnetic layers and spacer Cu is enhanced mainly by changing from Co 90Fe 10 to Fe 50Co 50, and the spin-dependent bulk resistance in free and pinned layers is enlarged by inserting half-atomic Cu layers.

Original languageEnglish
Pages (from-to)2646-2650
Number of pages5
JournalJournal of Applied Physics
Volume92
Issue number5
DOIs
Publication statusPublished - Sep 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Yuasa, H., Yoshikawa, M., Kamiguchi, Y., Koi, K., Iwasaki, H., Takagishi, M., & Sahashi, M. (2002). Output enhancement of spin-valve giant magnetoresistance in current-perpendicular-to-plane geometry. Journal of Applied Physics, 92(5), 2646-2650. https://doi.org/10.1063/1.1499744