Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

H. K. Lee; I. Barsukov; A. G. Swartz; B. Kim; L. Yang; H. Y. Hwang; I. N. Krivorotov

doi:10.1063/1.4950971

AIP Advances (May 2016)

Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

H. K. Lee,
I. Barsukov,
A. G. Swartz,
B. Kim,
L. Yang,
H. Y. Hwang,
I. N. Krivorotov

Affiliations

H. K. Lee: Physics and Astronomy, University of California, Irvine, California 92697, USA
I. Barsukov: Physics and Astronomy, University of California, Irvine, California 92697, USA
A. G. Swartz: Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, California 94305, USA
B. Kim: Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, California 94305, USA
L. Yang: Physics and Astronomy, University of California, Irvine, California 92697, USA
H. Y. Hwang: Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, California 94305, USA
I. N. Krivorotov: Physics and Astronomy, University of California, Irvine, California 92697, USA

DOI: https://doi.org/10.1063/1.4950971
Journal volume & issue: Vol. 6, no. 5
pp. 055212 – 055212-7

Abstract

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We report ferromagnetic resonance measurements of magnetic anisotropy and damping in epitaxial La0.7Sr0.3MnO3 (LSMO) and Pt capped LSMO thin films on SrTiO3 (001) substrates. The measurements reveal large negative perpendicular magnetic anisotropy and a weaker uniaxial in-plane anisotropy that are unaffected by the Pt cap. The Gilbert damping of the bare LSMO films is found to be low α = 1.9(1) × 10−3, and two-magnon scattering is determined to be significant and strongly anisotropic. The Pt cap increases the damping by 50% due to spin pumping, which is also directly detected via inverse spin Hall effect in Pt. Our work demonstrates efficient spin transport across the Pt/LSMO interface.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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