Cargando…

Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction

Spin-Cherenkov effect enables strong excitations of spin waves (SWs) with nonlinear wave dispersions. The Dzyaloshinskii-Moriya interaction (DMI) results in anisotropy and nonreciprocity of SWs propagation. In this work, we study the effect of the interfacial DMI on SW Cherenkov excitations in perma...

Descripción completa

Detalles Bibliográficos
Autores principales: Xia, Jing, Zhang, Xichao, Yan, Ming, Zhao, Weisheng, Zhou, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855169/
https://www.ncbi.nlm.nih.gov/pubmed/27143311
http://dx.doi.org/10.1038/srep25189
_version_ 1782430323812859904
author Xia, Jing
Zhang, Xichao
Yan, Ming
Zhao, Weisheng
Zhou, Yan
author_facet Xia, Jing
Zhang, Xichao
Yan, Ming
Zhao, Weisheng
Zhou, Yan
author_sort Xia, Jing
collection PubMed
description Spin-Cherenkov effect enables strong excitations of spin waves (SWs) with nonlinear wave dispersions. The Dzyaloshinskii-Moriya interaction (DMI) results in anisotropy and nonreciprocity of SWs propagation. In this work, we study the effect of the interfacial DMI on SW Cherenkov excitations in permalloy thin-film strips within the framework of micromagnetism. By performing micromagnetic simulations, it is shown that coherent SWs are excited when the velocity of a moving magnetic source exceeds the propagation velocity of the SWs. Moreover, the threshold velocity of the moving magnetic source with finite DMI can be reduced compared to the case of zero DMI. It thereby provides a promising route towards efficient spin wave generation and propagation, with potential applications in spintronic and magnonic devices.
format Online
Article
Text
id pubmed-4855169
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-48551692016-05-18 Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction Xia, Jing Zhang, Xichao Yan, Ming Zhao, Weisheng Zhou, Yan Sci Rep Article Spin-Cherenkov effect enables strong excitations of spin waves (SWs) with nonlinear wave dispersions. The Dzyaloshinskii-Moriya interaction (DMI) results in anisotropy and nonreciprocity of SWs propagation. In this work, we study the effect of the interfacial DMI on SW Cherenkov excitations in permalloy thin-film strips within the framework of micromagnetism. By performing micromagnetic simulations, it is shown that coherent SWs are excited when the velocity of a moving magnetic source exceeds the propagation velocity of the SWs. Moreover, the threshold velocity of the moving magnetic source with finite DMI can be reduced compared to the case of zero DMI. It thereby provides a promising route towards efficient spin wave generation and propagation, with potential applications in spintronic and magnonic devices. Nature Publishing Group 2016-05-04 /pmc/articles/PMC4855169/ /pubmed/27143311 http://dx.doi.org/10.1038/srep25189 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Xia, Jing
Zhang, Xichao
Yan, Ming
Zhao, Weisheng
Zhou, Yan
Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title_full Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title_fullStr Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title_full_unstemmed Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title_short Spin-Cherenkov effect in a magnetic nanostrip with interfacial Dzyaloshinskii-Moriya interaction
title_sort spin-cherenkov effect in a magnetic nanostrip with interfacial dzyaloshinskii-moriya interaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855169/
https://www.ncbi.nlm.nih.gov/pubmed/27143311
http://dx.doi.org/10.1038/srep25189
work_keys_str_mv AT xiajing spincherenkoveffectinamagneticnanostripwithinterfacialdzyaloshinskiimoriyainteraction
AT zhangxichao spincherenkoveffectinamagneticnanostripwithinterfacialdzyaloshinskiimoriyainteraction
AT yanming spincherenkoveffectinamagneticnanostripwithinterfacialdzyaloshinskiimoriyainteraction
AT zhaoweisheng spincherenkoveffectinamagneticnanostripwithinterfacialdzyaloshinskiimoriyainteraction
AT zhouyan spincherenkoveffectinamagneticnanostripwithinterfacialdzyaloshinskiimoriyainteraction