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Title: Short-range thermal magnon diffusion in magnetic garnet

Abstract

Here, using the spin Seebeck effect (SSE), we study the propagation distance of thermally induced spin currents inside a magnetic insulator thin film in the short-range regime. We disambiguate spin currents driven by temperature and chemical potential gradients by comparing the SSE signal before and after adding a heat-sinking capping layer on the same device. We report that the measured spin decay behavior near the heat source is well accounted for by a diffusion model where the magnon diffusion length is in submicron range, in other words, two orders of magnitude smaller than previous estimates inferred from the long-range behavior. Our results highlight the caveat in applying a diffusive theory to describe thermally generated magnon transport, where a single decay length may not capture the behavior on all length scales.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2];  [1]; ORCiD logo [3];  [4];  [5]; ORCiD logo [6];  [2]; ORCiD logo [1]
+ Show Author Affiliations
  1. Univ. of Grenoble Alpes, Grenoble (France)
  2. Univ. of California, Los Angeles, CA (United States)
  3. Univ. of Grenoble Alpes, Grenoble (France); Kazan Federal Univ. (Russian Federation)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France); Univ. de Bretagne Occidentale, Brest (France)
  5. Univ. de Bretagne Occidentale, Brest (France)
  6. Univ. Paris-Saclay, Gif-sur-Yvette (France)
Publication Date:
Research Org.:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); ANR of France; National Research Foundation of Korea (NRF)
OSTI Identifier:
1851599
Grant/Contract Number:  
SC0012190; 18-CE24-0021; 2021R1C201226911
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 103; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; magnetoresistance; magnetotransport; spin Seebeck effect; spin caloritronics; spin diffusion; ferrimagnets; magnetic multilayers; resistivity measurements

Citation Formats

An, K., Kohno, R., Thiery, N., Reitz, D., Vila, L., Naletov, V. V., Beaulieu, N., Ben Youssef, J., de Loubens, G., Tserkovnyak, Y., and Klein, O. Short-range thermal magnon diffusion in magnetic garnet. United States: N. p., 2021. Web. doi:10.1103/physrevb.103.174432.
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An, K., Kohno, R., Thiery, N., Reitz, D., Vila, L., Naletov, V. V., Beaulieu, N., Ben Youssef, J., de Loubens, G., Tserkovnyak, Y., & Klein, O. Short-range thermal magnon diffusion in magnetic garnet. United States. https://doi.org/10.1103/physrevb.103.174432
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An, K., Kohno, R., Thiery, N., Reitz, D., Vila, L., Naletov, V. V., Beaulieu, N., Ben Youssef, J., de Loubens, G., Tserkovnyak, Y., and Klein, O. Wed . "Short-range thermal magnon diffusion in magnetic garnet". United States. https://doi.org/10.1103/physrevb.103.174432. https://www.osti.gov/servlets/purl/1851599.
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@article{osti_1851599,
title = {Short-range thermal magnon diffusion in magnetic garnet},
author = {An, K. and Kohno, R. and Thiery, N. and Reitz, D. and Vila, L. and Naletov, V. V. and Beaulieu, N. and Ben Youssef, J. and de Loubens, G. and Tserkovnyak, Y. and Klein, O.},
abstractNote = {Here, using the spin Seebeck effect (SSE), we study the propagation distance of thermally induced spin currents inside a magnetic insulator thin film in the short-range regime. We disambiguate spin currents driven by temperature and chemical potential gradients by comparing the SSE signal before and after adding a heat-sinking capping layer on the same device. We report that the measured spin decay behavior near the heat source is well accounted for by a diffusion model where the magnon diffusion length is in submicron range, in other words, two orders of magnitude smaller than previous estimates inferred from the long-range behavior. Our results highlight the caveat in applying a diffusive theory to describe thermally generated magnon transport, where a single decay length may not capture the behavior on all length scales.},
doi = {10.1103/physrevb.103.174432},
journal = {Physical Review. B},
number = 17,
volume = 103,
place = {United States},
year = {Wed May 26 00:00:00 EDT 2021},
month = {Wed May 26 00:00:00 EDT 2021}
}
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https://doi.org/10.1103/physrevb.103.174432
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and the beat goes on…
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