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Title: Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect

Abstract

Due to its transverse nature, spin Hall effects (SHE) provide the possibility to excite and detect spin currents and magnetization dynamics even in magnetic insulators. Magnetic insulators are outstanding materials for the investigation of nonlinear phenomena and for novel low power spintronics applications because of their extremely low Gilbert damping. Here, we report on the direct imaging of electrically driven spin-torque ferromagnetic resonance (ST-FMR) in the ferrimagnetic insulator Y 3Fe 5O 12 based on the excitation and detection by SHEs. The driven spin dynamics in Y 3Fe 5O 12 is directly imaged by spatially-resolved microfocused Brillouin light scattering (BLS) spectroscopy. Previously, ST-FMR experiments assumed a uniform precession across the sample, which is not valid in our measurements. A strong spin-wave localization in the center of the sample is observed indicating the formation of a nonlinear, self-localized spin-wave `bullet'.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [1];  [1];  [4];  [1];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
  3. Colorado State Univ., Fort Collins, CO (United States). Physics Dept.
  4. Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (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) (SC-22)
OSTI Identifier:
1248728
Alternate Identifier(s):
OSTI ID: 1236535
Grant/Contract Number:  
AC02-06CH11357; SC0012670; ECCS-1231598; W911NF-14-1-0501
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Jungfleisch, M. B., Zhang, W., Sklenar, J., Ding, J., Jiang, W., Chang, H., Fradin, F. Y., Pearson, J. E., Ketterson, J. B., Novosad, V., Wu, M., and Hoffmann, A. Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.057601.
Jungfleisch, M. B., Zhang, W., Sklenar, J., Ding, J., Jiang, W., Chang, H., Fradin, F. Y., Pearson, J. E., Ketterson, J. B., Novosad, V., Wu, M., & Hoffmann, A. Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect. United States. doi:10.1103/PhysRevLett.116.057601.
Jungfleisch, M. B., Zhang, W., Sklenar, J., Ding, J., Jiang, W., Chang, H., Fradin, F. Y., Pearson, J. E., Ketterson, J. B., Novosad, V., Wu, M., and Hoffmann, A. Mon . "Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect". United States. doi:10.1103/PhysRevLett.116.057601. https://www.osti.gov/servlets/purl/1248728.
@article{osti_1248728,
title = {Large Spin-Wave Bullet in a Ferrimagnetic Insulator Driven by the Spin Hall Effect},
author = {Jungfleisch, M. B. and Zhang, W. and Sklenar, J. and Ding, J. and Jiang, W. and Chang, H. and Fradin, F. Y. and Pearson, J. E. and Ketterson, J. B. and Novosad, V. and Wu, M. and Hoffmann, A.},
abstractNote = {Due to its transverse nature, spin Hall effects (SHE) provide the possibility to excite and detect spin currents and magnetization dynamics even in magnetic insulators. Magnetic insulators are outstanding materials for the investigation of nonlinear phenomena and for novel low power spintronics applications because of their extremely low Gilbert damping. Here, we report on the direct imaging of electrically driven spin-torque ferromagnetic resonance (ST-FMR) in the ferrimagnetic insulator Y3Fe5O12 based on the excitation and detection by SHEs. The driven spin dynamics in Y3Fe5O12 is directly imaged by spatially-resolved microfocused Brillouin light scattering (BLS) spectroscopy. Previously, ST-FMR experiments assumed a uniform precession across the sample, which is not valid in our measurements. A strong spin-wave localization in the center of the sample is observed indicating the formation of a nonlinear, self-localized spin-wave `bullet'.},
doi = {10.1103/PhysRevLett.116.057601},
journal = {Physical Review Letters},
number = 5,
volume = 116,
place = {United States},
year = {2016},
month = {2}
}

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