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Title: Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect

Abstract

The spin Seebeck effect (SSE) is a phenomenon where a spin current is generated from thermal excitations in magnetic materials. It is believed that magnetic long-range order (LRO) is not required for SSE, while short-ranged order (SRO) plays an important role. However, a definitive experimental demonstration of the connection between the SSE and SRO has been missing. Here, we show that the SSE is able to probe a specific SRO in a model geometrically frustrated magnet Gd 3Ga 5O 12 (GGG). A field-induced SRO in GGG is detected by the SSE in the temperature range 2-5 K. The origin of the SRO is verified by comparing the SSE data directly to existing neutron scattering measurements at much lower temperatures (T < 0.9 K), where field-induced LRO exists. Our theoretical calculations of the magnetic structure further confirm the anisotropic field dependence of the SRO in GGG. Furthermore, these findings establish that the SSE can serve as an effective probe of SRO in geometrically frustrated magnets.

Authors:
 [1];  [2];  [1];  [1];  [3];  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Rochester, Rochester, NY (United States)
  3. Univ. of Warwick, Coventry (United Kingdom)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1480259
Alternate Identifier(s):
OSTI ID: 1467157
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Changjiang, Wu, Stephen M., Pearson, John E., Jiang, J. Samuel, d'Ambrumenil, N., and Bhattacharya, Anand. Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.060415.
Liu, Changjiang, Wu, Stephen M., Pearson, John E., Jiang, J. Samuel, d'Ambrumenil, N., & Bhattacharya, Anand. Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect. United States. doi:10.1103/PhysRevB.98.060415.
Liu, Changjiang, Wu, Stephen M., Pearson, John E., Jiang, J. Samuel, d'Ambrumenil, N., and Bhattacharya, Anand. Tue . "Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect". United States. doi:10.1103/PhysRevB.98.060415. https://www.osti.gov/servlets/purl/1480259.
@article{osti_1480259,
title = {Probing short-range magnetic order in a geometrically frustrated magnet by means of the spin Seebeck effect},
author = {Liu, Changjiang and Wu, Stephen M. and Pearson, John E. and Jiang, J. Samuel and d'Ambrumenil, N. and Bhattacharya, Anand},
abstractNote = {The spin Seebeck effect (SSE) is a phenomenon where a spin current is generated from thermal excitations in magnetic materials. It is believed that magnetic long-range order (LRO) is not required for SSE, while short-ranged order (SRO) plays an important role. However, a definitive experimental demonstration of the connection between the SSE and SRO has been missing. Here, we show that the SSE is able to probe a specific SRO in a model geometrically frustrated magnet Gd3Ga5O12 (GGG). A field-induced SRO in GGG is detected by the SSE in the temperature range 2-5 K. The origin of the SRO is verified by comparing the SSE data directly to existing neutron scattering measurements at much lower temperatures (T < 0.9 K), where field-induced LRO exists. Our theoretical calculations of the magnetic structure further confirm the anisotropic field dependence of the SRO in GGG. Furthermore, these findings establish that the SSE can serve as an effective probe of SRO in geometrically frustrated magnets.},
doi = {10.1103/PhysRevB.98.060415},
journal = {Physical Review B},
number = 6,
volume = 98,
place = {United States},
year = {2018},
month = {8}
}

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