Direct observation of magnon-phonon coupling in yttrium iron garnet
Abstract
The magnetic insulator yttrium iron garnet (YIG) with a ferrimagnetic transition temperature of ~ 560 K has been widely used in microwave and spintronic devices. Anomalous features in spin Seeback effect (SSE) voltages have been observed in Pt/YIG and attributed to magnon-phonon coupling. Here, we use inelastic neutron scattering to map out low-energy spin waves and acoustic phonons of YIG at 100 K as a function of increasing magnetic field. In this work, by comparing the zero and 9.1 T data, we find that instead of splitting and opening up gaps at the spin wave and acoustic phonon dispersion intersecting points, magnon-phonon coupling in YIG enhances the hybridized scattering intensity. These results are different from expectations of conventional spin-lattice coupling, calling for different paradigms to understand the scattering process of magnon-phonon interactions and the resulting magnon polarons.
- Authors:
-
- Rice Univ., Houston, TX (United States)
- Univ. of California, Riverside, CA (United States); Tongji University, Shanghai (China)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Univ. of California, Riverside, CA (United States)
- Univ. of Texas, Austin, TX (United States)
- Beijing Normal University (China)
- Rice Univ., Houston, TX (United States); Beijing Normal University (China)
- Publication Date:
- Research Org.:
- 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); Robert A. Welch Foundation; US Army Research Office (ARO); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1470136
- Alternate Identifier(s):
- OSTI ID: 1395197
- Grant/Contract Number:
- SC0012670; SC0012311; C-1839; W911NF-14-1-0016; 61774017
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 10; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
Citation Formats
Man, Haoran, Shi, Zhong, Xu, Guangyong, Xu, Yadong, Chen, Xi, Sullivan, Sean, Zhou, Jianshi, Xia, Ke, Shi, Jing, and Dai, Pengcheng. Direct observation of magnon-phonon coupling in yttrium iron garnet. United States: N. p., 2017.
Web. doi:10.1103/physrevb.96.100406.
Man, Haoran, Shi, Zhong, Xu, Guangyong, Xu, Yadong, Chen, Xi, Sullivan, Sean, Zhou, Jianshi, Xia, Ke, Shi, Jing, & Dai, Pengcheng. Direct observation of magnon-phonon coupling in yttrium iron garnet. United States. https://doi.org/10.1103/physrevb.96.100406
Man, Haoran, Shi, Zhong, Xu, Guangyong, Xu, Yadong, Chen, Xi, Sullivan, Sean, Zhou, Jianshi, Xia, Ke, Shi, Jing, and Dai, Pengcheng. Wed .
"Direct observation of magnon-phonon coupling in yttrium iron garnet". United States. https://doi.org/10.1103/physrevb.96.100406. https://www.osti.gov/servlets/purl/1470136.
@article{osti_1470136,
title = {Direct observation of magnon-phonon coupling in yttrium iron garnet},
author = {Man, Haoran and Shi, Zhong and Xu, Guangyong and Xu, Yadong and Chen, Xi and Sullivan, Sean and Zhou, Jianshi and Xia, Ke and Shi, Jing and Dai, Pengcheng},
abstractNote = {The magnetic insulator yttrium iron garnet (YIG) with a ferrimagnetic transition temperature of ~ 560 K has been widely used in microwave and spintronic devices. Anomalous features in spin Seeback effect (SSE) voltages have been observed in Pt/YIG and attributed to magnon-phonon coupling. Here, we use inelastic neutron scattering to map out low-energy spin waves and acoustic phonons of YIG at 100 K as a function of increasing magnetic field. In this work, by comparing the zero and 9.1 T data, we find that instead of splitting and opening up gaps at the spin wave and acoustic phonon dispersion intersecting points, magnon-phonon coupling in YIG enhances the hybridized scattering intensity. These results are different from expectations of conventional spin-lattice coupling, calling for different paradigms to understand the scattering process of magnon-phonon interactions and the resulting magnon polarons.},
doi = {10.1103/physrevb.96.100406},
journal = {Physical Review B},
number = 10,
volume = 96,
place = {United States},
year = {Wed Sep 27 00:00:00 EDT 2017},
month = {Wed Sep 27 00:00:00 EDT 2017}
}
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