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Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta

C. Hahn, G. de Loubens, O. Klein, M. Viret, V. V. Naletov, and J. Ben Youssef
Phys. Rev. B 87, 174417 – Published 13 May 2013
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Abstract

We report on a comparative study of spin Hall related effects and magnetoresistance in YIG|Pt and YIG|Ta bilayers. These combined measurements allow to estimate the characteristic transport parameters of both Pt and Ta layers juxtaposed to yttrium iron garnet (YIG): the spin mixing conductance G at the YIG|normal metal interface, the spin Hall angle ΘSH, and the spin diffusion length λsd in the normal metal. The inverse spin Hall voltages generated in Pt and Ta by the pure spin current pumped from YIG excited at resonance confirm the opposite signs of spin Hall angles in these two materials. Moreover, from the dependence of the inverse spin Hall voltage on the Ta thickness, we extract the spin diffusion length in Ta, found to be λsdTa=1.8±0.7 nm. Both the YIG|Pt and YIG|Ta systems display a similar variation of resistance upon magnetic field orientation, which can be explained in the recently developed framework of spin Hall magnetoresistance.

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  • Received 18 February 2013

DOI:https://doi.org/10.1103/PhysRevB.87.174417

©2013 American Physical Society

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Insulating Magnets Control Neighbor’s Conduction

Published 13 May 2013

A newly discovered type of magnetoresistance, resulting from spin-dependent scattering at a metal-magnet interface, may potentially be used to study the magnetization in insulating magnets or to develop new spintronic devices.

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Authors & Affiliations

C. Hahn, G. de Loubens*, O. Klein, and M. Viret

  • Service de Physique de l’État Condensé (CNRS URA 2464), CEA Saclay, 91191 Gif-sur-Yvette, France

V. V. Naletov

  • Service de Physique de l’État Condensé (CNRS URA 2464), CEA Saclay, 91191 Gif-sur-Yvette, France and
  • Institute of Physics, Kazan Federal University, Kazan 420008, Russian Federation

J. Ben Youssef

  • Université de Bretagne Occidentale, Laboratoire de Magnétisme de Bretagne CNRS, 6 Avenue Le Gorgeu, 29285 Brest, France

  • *Corresponding author: gregoire.deloubens@cea.fr

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Issue

Vol. 87, Iss. 17 — 1 May 2013

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