Driving a magnetized domain wall in an antiferromagnet by magnons
Abstract
We theoretically study the interaction of magnons, quanta of spin waves, and a domain wall in a one-dimensional easy-axis antiferromagnet in the presence of an external magnetic field applied along the easy axis. To this end, we begin by obtaining the exact solution for spin waves in the background of a domain wall magnetized by an external field. The finite magnetization inside the domain wall is shown to give rise to reflection of magnons scattering off the domain wall, deviating from the well-known result of reflection-free magnons in the absence of a magnetic field. For practical applications of the predicted reflection of magnons, we show that the magnon reflection contributes to the thermally driven domain-wall motion. Our work leads us to envision that inducing a finite magnetization in antiferromagnetic solitons such as vortices and skyrmions can be used to engender phenomena that do not occur in the absence of magnetization.
- Authors:
-
[1];
[2];
[3]
- Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
- Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
- Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy; Korea Advanced Inst. of Science and Technology, Daejeon (Korea, Republic of). Dept. of Physics
- Publication Date:
- Research Org.:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1802316
- Alternate Identifier(s):
- OSTI ID: 1632728
- Grant/Contract Number:
- SC0012190
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 127; Journal Issue: 22; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Shen, Pengtao, Tserkovnyak, Yaroslav, and Kim, Se Kwon. Driving a magnetized domain wall in an antiferromagnet by magnons. United States: N. p., 2020.
Web. doi:10.1063/5.0006038.
Shen, Pengtao, Tserkovnyak, Yaroslav, & Kim, Se Kwon. Driving a magnetized domain wall in an antiferromagnet by magnons. United States. https://doi.org/10.1063/5.0006038
Shen, Pengtao, Tserkovnyak, Yaroslav, and Kim, Se Kwon. Tue .
"Driving a magnetized domain wall in an antiferromagnet by magnons". United States. https://doi.org/10.1063/5.0006038. https://www.osti.gov/servlets/purl/1802316.
@article{osti_1802316,
title = {Driving a magnetized domain wall in an antiferromagnet by magnons},
author = {Shen, Pengtao and Tserkovnyak, Yaroslav and Kim, Se Kwon},
abstractNote = {We theoretically study the interaction of magnons, quanta of spin waves, and a domain wall in a one-dimensional easy-axis antiferromagnet in the presence of an external magnetic field applied along the easy axis. To this end, we begin by obtaining the exact solution for spin waves in the background of a domain wall magnetized by an external field. The finite magnetization inside the domain wall is shown to give rise to reflection of magnons scattering off the domain wall, deviating from the well-known result of reflection-free magnons in the absence of a magnetic field. For practical applications of the predicted reflection of magnons, we show that the magnon reflection contributes to the thermally driven domain-wall motion. Our work leads us to envision that inducing a finite magnetization in antiferromagnetic solitons such as vortices and skyrmions can be used to engender phenomena that do not occur in the absence of magnetization.},
doi = {10.1063/5.0006038},
journal = {Journal of Applied Physics},
number = 22,
volume = 127,
place = {United States},
year = {Tue Jun 09 00:00:00 EDT 2020},
month = {Tue Jun 09 00:00:00 EDT 2020}
}
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