Cargando…

Scaling of domain cascades in stripe and skyrmion phases

The origin of deterministic macroscopic properties often lies in microscopic stochastic motion. Magnetic fluctuations that manifest as domain avalanches and chaotic magnetization jumps exemplify such stochastic motion and have been studied in great detail. Here we report Fourier space studies of ava...

Descripción completa

Detalles Bibliográficos
Autores principales: Singh, A., Lee, J. C. T, Avila, K. E., Chen, Y., Montoya, S. A., Fullerton, E. E., Fischer, P., Dahmen, K. A., Kevan, S. D., Sanyal, M. K., Roy, S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6491444/
https://www.ncbi.nlm.nih.gov/pubmed/31040276
http://dx.doi.org/10.1038/s41467-019-09934-z
_version_ 1783414937725435904
author Singh, A.
Lee, J. C. T
Avila, K. E.
Chen, Y.
Montoya, S. A.
Fullerton, E. E.
Fischer, P.
Dahmen, K. A.
Kevan, S. D.
Sanyal, M. K.
Roy, S.
author_facet Singh, A.
Lee, J. C. T
Avila, K. E.
Chen, Y.
Montoya, S. A.
Fullerton, E. E.
Fischer, P.
Dahmen, K. A.
Kevan, S. D.
Sanyal, M. K.
Roy, S.
author_sort Singh, A.
collection PubMed
description The origin of deterministic macroscopic properties often lies in microscopic stochastic motion. Magnetic fluctuations that manifest as domain avalanches and chaotic magnetization jumps exemplify such stochastic motion and have been studied in great detail. Here we report Fourier space studies of avalanches in a system exhibiting competing magnetic stripe and skyrmion phase using a soft X-ray speckle metrology technique. We demonstrate the existence of phase boundaries and underlying critical points in the stripe and skyrmion phases. We found that distinct scaling and universality classes are associated with these domain topologies. The magnitude and frequency of abrupt magnetic domain jumps observed in the stripe phase are dramatically reduced in the skyrmion phase. Our results provide an incisive way to probe and understand phase stability in systems exhibiting complex spin topologies.
format Online
Article
Text
id pubmed-6491444
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-64914442019-05-02 Scaling of domain cascades in stripe and skyrmion phases Singh, A. Lee, J. C. T Avila, K. E. Chen, Y. Montoya, S. A. Fullerton, E. E. Fischer, P. Dahmen, K. A. Kevan, S. D. Sanyal, M. K. Roy, S. Nat Commun Article The origin of deterministic macroscopic properties often lies in microscopic stochastic motion. Magnetic fluctuations that manifest as domain avalanches and chaotic magnetization jumps exemplify such stochastic motion and have been studied in great detail. Here we report Fourier space studies of avalanches in a system exhibiting competing magnetic stripe and skyrmion phase using a soft X-ray speckle metrology technique. We demonstrate the existence of phase boundaries and underlying critical points in the stripe and skyrmion phases. We found that distinct scaling and universality classes are associated with these domain topologies. The magnitude and frequency of abrupt magnetic domain jumps observed in the stripe phase are dramatically reduced in the skyrmion phase. Our results provide an incisive way to probe and understand phase stability in systems exhibiting complex spin topologies. Nature Publishing Group UK 2019-04-30 /pmc/articles/PMC6491444/ /pubmed/31040276 http://dx.doi.org/10.1038/s41467-019-09934-z Text en © This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Singh, A.
Lee, J. C. T
Avila, K. E.
Chen, Y.
Montoya, S. A.
Fullerton, E. E.
Fischer, P.
Dahmen, K. A.
Kevan, S. D.
Sanyal, M. K.
Roy, S.
Scaling of domain cascades in stripe and skyrmion phases
title Scaling of domain cascades in stripe and skyrmion phases
title_full Scaling of domain cascades in stripe and skyrmion phases
title_fullStr Scaling of domain cascades in stripe and skyrmion phases
title_full_unstemmed Scaling of domain cascades in stripe and skyrmion phases
title_short Scaling of domain cascades in stripe and skyrmion phases
title_sort scaling of domain cascades in stripe and skyrmion phases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6491444/
https://www.ncbi.nlm.nih.gov/pubmed/31040276
http://dx.doi.org/10.1038/s41467-019-09934-z
work_keys_str_mv AT singha scalingofdomaincascadesinstripeandskyrmionphases
AT leejct scalingofdomaincascadesinstripeandskyrmionphases
AT avilake scalingofdomaincascadesinstripeandskyrmionphases
AT cheny scalingofdomaincascadesinstripeandskyrmionphases
AT montoyasa scalingofdomaincascadesinstripeandskyrmionphases
AT fullertonee scalingofdomaincascadesinstripeandskyrmionphases
AT fischerp scalingofdomaincascadesinstripeandskyrmionphases
AT dahmenka scalingofdomaincascadesinstripeandskyrmionphases
AT kevansd scalingofdomaincascadesinstripeandskyrmionphases
AT sanyalmk scalingofdomaincascadesinstripeandskyrmionphases
AT roys scalingofdomaincascadesinstripeandskyrmionphases