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Title: Surface magnetic anisotropy-mediated spin Hall magnetoresistance and spin Seebeck effects in a YIG/Pt heterostructure

Abstract

The role of magnon-phonon coupling in the low-temperature behavior of the spin Seebeck effect (SSE) in YIG/Pt has been puzzling for more than a decade. Here, to elucidate the origin of the anomalous peak around 80 K, we investigate the temperature evolution of SSE, spin Hall magnetoresistance (SMR), and magnetic anisotropy in the same YIG/Pt heterostructure. We find that these effects, along with magnetic damping, show the peaks at the same temperature (~80 K). This simultaneous occurrence, where no heat is applied in the case of SMR, rules out the phonon-magnon drag related origin of SSE in the YIG/Pt system. We further show that the intrinsic surface anisotropy behavior in YIG is responsible for controlling the SSE, SMR, and magnetic damping in the YIG/Pt structure. Our findings not only help to understand these effects fundamentally but also provide an effective way for improving them by manipulating the surface magnetic anisotropy for spin caloritronic applications.

Authors:
 [1];  [2];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of South Florida, Tampa, FL (United States)
  2. A&A Green Phoenix Group (Vietnam)
Publication Date:
Research Org.:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1977336
Alternate Identifier(s):
OSTI ID: 1846322
Grant/Contract Number:  
FG02-07ER46438
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 551; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YIG; magnetic anisotropy; spin Seebeck effect; spin Hall magneto-resistance

Citation Formats

Kalappattil, V., Das, R., Phan, M. H., and Srikanth, H. Surface magnetic anisotropy-mediated spin Hall magnetoresistance and spin Seebeck effects in a YIG/Pt heterostructure. United States: N. p., 2022. Web. doi:10.1016/j.jmmm.2022.169173.
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Kalappattil, V., Das, R., Phan, M. H., & Srikanth, H. Surface magnetic anisotropy-mediated spin Hall magnetoresistance and spin Seebeck effects in a YIG/Pt heterostructure. United States. https://doi.org/10.1016/j.jmmm.2022.169173
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Kalappattil, V., Das, R., Phan, M. H., and Srikanth, H. Wed . "Surface magnetic anisotropy-mediated spin Hall magnetoresistance and spin Seebeck effects in a YIG/Pt heterostructure". United States. https://doi.org/10.1016/j.jmmm.2022.169173. https://www.osti.gov/servlets/purl/1977336.
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@article{osti_1977336,
title = {Surface magnetic anisotropy-mediated spin Hall magnetoresistance and spin Seebeck effects in a YIG/Pt heterostructure},
author = {Kalappattil, V. and Das, R. and Phan, M. H. and Srikanth, H.},
abstractNote = {The role of magnon-phonon coupling in the low-temperature behavior of the spin Seebeck effect (SSE) in YIG/Pt has been puzzling for more than a decade. Here, to elucidate the origin of the anomalous peak around 80 K, we investigate the temperature evolution of SSE, spin Hall magnetoresistance (SMR), and magnetic anisotropy in the same YIG/Pt heterostructure. We find that these effects, along with magnetic damping, show the peaks at the same temperature (~80 K). This simultaneous occurrence, where no heat is applied in the case of SMR, rules out the phonon-magnon drag related origin of SSE in the YIG/Pt system. We further show that the intrinsic surface anisotropy behavior in YIG is responsible for controlling the SSE, SMR, and magnetic damping in the YIG/Pt structure. Our findings not only help to understand these effects fundamentally but also provide an effective way for improving them by manipulating the surface magnetic anisotropy for spin caloritronic applications.},
doi = {10.1016/j.jmmm.2022.169173},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 551,
place = {United States},
year = {Wed Feb 16 00:00:00 EST 2022},
month = {Wed Feb 16 00:00:00 EST 2022}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.jmmm.2022.169173
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