Spin-Hall and anisotropic magnetoresistance in ferrimagnetic Co-Gd/Pt layers

W. Zhou, T. Seki*, T. Kubota, G. E. W. Bauer, K. Takanashi

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

We present the Co-Gd composition dependence of the spin-Hall magnetoresistance (SMR) and anisotropic magnetoresistance (AMR) for ferrimagnetic Co100-xGdx/Pt bilayers. With Gd concentration x, its magnetic moment increasingly competes with the Co moment in the net magnetization. We find a nearly compensated ferrimagnetic state at x = 24. The AMR changes sign from positive to negative with increasing x, vanishing near the magnetization compensation. On the other hand, the SMR does not vary significantly even where the AMR vanishes. These experimental results indicate that very different scattering mechanisms are responsible for AMR and SMR. We discuss a possible origin for the alloy composition dependence.

Original languageEnglish
Article number094404
Number of pages7
JournalPhysical Review Materials
Volume2
Issue number9
DOIs
Publication statusPublished - 5-Sep-2018

Keywords

  • TEMPERATURE
  • BILAYERS

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