Extrinsic Spin Hall Effect Induced by Iridium Impurities in Copper

Y. Niimi, M. Morota, D. H. Wei, C. Deranlot, M. Basletic, A. Hamzic, A. Fert, and Y. Otani
Phys. Rev. Lett. 106, 126601 – Published 22 March 2011
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Abstract

We study the extrinsic spin Hall effect induced by Ir impurities in Cu by injecting a pure spin current into a CuIr wire from a lateral spin valve structure. While no spin Hall effect is observed without Ir impurity, the spin Hall resistivity of CuIr increases linearly with the impurity concentration. The spin Hall angle of CuIr, (2.1±0.6)% throughout the concentration range between 1% and 12%, is practically independent of temperature. These results represent a clear example of predominant skew scattering extrinsic contribution to the spin Hall effect in a nonmagnetic alloy.

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  • Received 12 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.126601

© 2011 American Physical Society

Authors & Affiliations

Y. Niimi1,*, M. Morota1, D. H. Wei1, C. Deranlot2, M. Basletic3, A. Hamzic3, A. Fert2, and Y. Otani1,4

  • 1Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
  • 2Unité Mixte de Physique CNRS/Thales, 91767 Palaiseau France associée à l’Université de Paris-Sud, 91405 Orsay, France
  • 3Department of Physics, Faculty of Science, University of Zagreb, P.O. Box 331, HR-10002 Zagreb, Croatia
  • 4RIKEN-ASI, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

  • *niimi@issp.u-tokyo.ac.jp

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Issue

Vol. 106, Iss. 12 — 25 March 2011

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