Efficient Spin Torques in Antiferromagnetic CoO/Pt Quantified by Comparing Field- and Current-Induced Switching

L. Baldrati, C. Schmitt, O. Gomonay, R. Lebrun, R. Ramos, E. Saitoh, J. Sinova, and M. Kläui
Phys. Rev. Lett. 125, 077201 – Published 10 August 2020
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Abstract

We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulses and magnetic fields, we quantify the efficiency of the acting current-induced torques and estimate a current-field equivalence ratio of 4×1011TA1m2. The Néel vector final state (nj) is in line with a thermomagnetoelastic switching mechanism for a negative magnetoelastic constant of the CoO.

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  • Received 26 February 2020
  • Revised 2 July 2020
  • Accepted 10 July 2020
  • Corrected 10 March 2021

DOI:https://doi.org/10.1103/PhysRevLett.125.077201

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Corrections

10 March 2021

Correction: For compliance purposes, more specific wording was added in the Acknowledgments section for the s-Nebula project.

Authors & Affiliations

L. Baldrati1,*, C. Schmitt1, O. Gomonay1, R. Lebrun1,2, R. Ramos3, E. Saitoh3,4,5,6,7, J. Sinova1,8,9, and M. Kläui1,9,†

  • 1Institute of Physics, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany
  • 2Unité Mixte de Physique CNRS, Thales, Université Paris-Sud, Université Paris-Saclay, Palaiseau 91767, France
  • 3WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 4Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 5Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
  • 6Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan
  • 7Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan
  • 8Institute of Physics, Academy of Sciences of the Czech Republic, Praha 11720, Czech Republic
  • 9Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany

  • *lbaldrat@uni-mainz.de
  • Klaeui@Uni-Mainz.de

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Issue

Vol. 125, Iss. 7 — 14 August 2020

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