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

Abstract

In this paper, 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 research demonstrates efficient spin transport across the Pt/LSMO interface.

Authors:
 [1];  [1];  [2];  [2];  [1];  [3];  [1]
  1. Univ. of California, Irvine, CA (United States)
  2. Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1272359
Grant/Contract Number:  
SC0012670
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; magnetic anisotropy; magnetic films; epitaxy; linewidths; metallic thin films

Citation Formats

Lee, H. K., Barsukov, I., Swartz, A. G., Kim, B., Yang, L., Hwang, H. Y., and Krivorotov, I. N.. Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers. United States: N. p., 2016. Web. doi:10.1063/1.4950971.
Lee, H. K., Barsukov, I., Swartz, A. G., Kim, B., Yang, L., Hwang, H. Y., & Krivorotov, I. N.. Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers. United States. https://doi.org/10.1063/1.4950971
Lee, H. K., Barsukov, I., Swartz, A. G., Kim, B., Yang, L., Hwang, H. Y., and Krivorotov, I. N.. Mon . "Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers". United States. https://doi.org/10.1063/1.4950971. https://www.osti.gov/servlets/purl/1272359.
@article{osti_1272359,
title = {Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers},
author = {Lee, H. K. and Barsukov, I. and Swartz, A. G. and Kim, B. and Yang, L. and Hwang, H. Y. and Krivorotov, I. N.},
abstractNote = {In this paper, 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 research demonstrates efficient spin transport across the Pt/LSMO interface.},
doi = {10.1063/1.4950971},
journal = {AIP Advances},
number = 5,
volume = 6,
place = {United States},
year = {Mon May 16 00:00:00 EDT 2016},
month = {Mon May 16 00:00:00 EDT 2016}
}

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Cited by: 30 works
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