Coherent ac spin current transmission across an antiferromagnetic CoO insulator

Q. Li; M. Yang; C. Klewe; P. Shafer; A. T. N’Diaye; D. Hou; T. Y. Wang; N. Gao; E. Saitoh; C. Hwang; R. J. Hicken; J. Li; E. Arenholz; Z. Q. Qiu

doi:10.1038/s41467-019-13280-5

Nature Communications (Nov 2019)

Coherent ac spin current transmission across an antiferromagnetic CoO insulator

Q. Li,
M. Yang,
C. Klewe,
P. Shafer,
A. T. N’Diaye,
D. Hou,
T. Y. Wang,
N. Gao,
E. Saitoh,
C. Hwang,
R. J. Hicken,
J. Li,
E. Arenholz,
Z. Q. Qiu

Affiliations

Q. Li: Department of Physics, University of California at Berkeley
M. Yang: Department of Physics, University of California at Berkeley
C. Klewe: Advanced Light Source, Lawrence Berkeley National Laboratory
P. Shafer: Advanced Light Source, Lawrence Berkeley National Laboratory
A. T. N’Diaye: Advanced Light Source, Lawrence Berkeley National Laboratory
D. Hou: WPI Advanced Institute for Materials Research, Tohoku University
T. Y. Wang: Department of Physics, University of California at Berkeley
N. Gao: Department of Physics, University of California at Berkeley
E. Saitoh: WPI Advanced Institute for Materials Research, Tohoku University
C. Hwang: Korea Research Institute of Standards and Science, Yuseong
R. J. Hicken: Department of Physics and Astronomy, University of Exeter
J. Li: International Center for Quantum Materials, School of Physics, Peking University
E. Arenholz: Advanced Light Source, Lawrence Berkeley National Laboratory
Z. Q. Qiu: Department of Physics, University of California at Berkeley

DOI: https://doi.org/10.1038/s41467-019-13280-5
Journal volume & issue: Vol. 10, no. 1
pp. 1 – 6

Abstract

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The mechanism underpinning the frequency mismatch between THz magnons and the GHz spin currents observed in antiferromagnetic insulators remains unknown. Here, the authors demonstrate that, in a Py/Ag/CoO/Ag/Fe75Co25/MgO(001) heterostructure, a GHz spin current transmits coherently across the antiferromagnetic CoO insulating layer to drive a coherent spin precession of the ferromagnetic Fe75Co25 layer.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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