Strong Suppression of the Spin Hall Effect in the Spin Glass State

Y. Niimi, M. Kimata, Y. Omori, B. Gu, T. Ziman, S. Maekawa, A. Fert, Y. Otani

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We have measured spin Hall effects in spin glass metals, CuMnBi alloys, with the spin absorption method in the lateral spin valve structure. Far above the spin glass temperature Tg where the magnetic moments of Mn impurities are randomly frozen, the spin Hall angle of a CuMnBi ternary alloy is as large as that of a CuBi binary alloy. Surprisingly, however, it starts to decrease at about 4Tg and becomes as little as 7 times smaller at 0.5Tg. A similar tendency was also observed in anomalous Hall effects in the ternary alloys. We propose an explanation in terms of a simple model considering the relative dynamics between the localized moment and the conduction electron spin.

Original languageEnglish
Article number196602
JournalPhysical review letters
Volume115
Issue number19
DOIs
Publication statusPublished - 2015 Nov 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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