Enhancement of current-perpendicular-to-plane giant magnetoresistance in Heusler-alloy based pseudo spin valves by using a CuZn spacer layer

T. Furubayashi, Y. K. Takahashi, T. T. Sasaki, K. Hono

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Enhancement of magnetoresistance output was attained in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices by using a bcc CuZn alloy for the spacer. Pseudo spin valves that consisted of the Co2Fe(Ga0.5Ge0.5) Heusler alloy for ferromagnetic layers and CuZn alloy with the composition of Cu52.4Zn47.6 for a spacer showed the large change of the resistance-area products, ΔRA, up to 8 mΩ�μm2 for a low annealing temperature of 350 �C. The ΔRA value is one of the highest reported so far for the CPP-GMR devices for the low annealing temperature, which is essential for processing read heads for hard disk drives. We consider that the enhancement of ΔRA is produced from the spin-dependent resistance at the Co2Fe(Ga0.5Ge0.5)/CuZn interfaces.

Original languageEnglish
Article number163901
JournalJournal of Applied Physics
Volume118
Issue number16
DOIs
Publication statusPublished - 2015 Oct 28
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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