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Dramatic pressure-driven enhancement of bulk skyrmion stability
The recent discovery of magnetic skyrmion lattices initiated a surge of interest in the scientific community. Several novel phenomena have been shown to emerge from the interaction of conducting electrons with the skyrmion lattice, such as a topological Hall-effect and a spin-transfer torque at ultr...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4759555/ https://www.ncbi.nlm.nih.gov/pubmed/26892190 http://dx.doi.org/10.1038/srep21347 |
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author | Levatić, I. Popčević, P. Šurija, V. Kruchkov, A. Berger, H. Magrez, A. White, J. S. Rønnow, H. M. Živković, I. |
author_facet | Levatić, I. Popčević, P. Šurija, V. Kruchkov, A. Berger, H. Magrez, A. White, J. S. Rønnow, H. M. Živković, I. |
author_sort | Levatić, I. |
collection | PubMed |
description | The recent discovery of magnetic skyrmion lattices initiated a surge of interest in the scientific community. Several novel phenomena have been shown to emerge from the interaction of conducting electrons with the skyrmion lattice, such as a topological Hall-effect and a spin-transfer torque at ultra-low current densities. In the insulating compound Cu(2)OSeO(3), magneto-electric coupling enables control of the skyrmion lattice via electric fields, promising a dissipation-less route towards novel spintronic devices. One of the outstanding fundamental issues is related to the thermodynamic stability of the skyrmion lattice. To date, the skyrmion lattice in bulk materials has been found only in a narrow temperature region just below the order-disorder transition. If this narrow stability is unavoidable, it would severely limit applications. Here we present the discovery that applying just moderate pressure on Cu(2)OSeO(3) substantially increases the absolute size of the skyrmion pocket. This insight demonstrates directly that tuning the electronic structure can lead to a significant enhancement of the skyrmion lattice stability. We interpret the discovery by extending the previously employed Ginzburg-Landau approach and conclude that change in the anisotropy is the main driver for control of the size of the skyrmion pocket. |
format | Online Article Text |
id | pubmed-4759555 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47595552016-02-26 Dramatic pressure-driven enhancement of bulk skyrmion stability Levatić, I. Popčević, P. Šurija, V. Kruchkov, A. Berger, H. Magrez, A. White, J. S. Rønnow, H. M. Živković, I. Sci Rep Article The recent discovery of magnetic skyrmion lattices initiated a surge of interest in the scientific community. Several novel phenomena have been shown to emerge from the interaction of conducting electrons with the skyrmion lattice, such as a topological Hall-effect and a spin-transfer torque at ultra-low current densities. In the insulating compound Cu(2)OSeO(3), magneto-electric coupling enables control of the skyrmion lattice via electric fields, promising a dissipation-less route towards novel spintronic devices. One of the outstanding fundamental issues is related to the thermodynamic stability of the skyrmion lattice. To date, the skyrmion lattice in bulk materials has been found only in a narrow temperature region just below the order-disorder transition. If this narrow stability is unavoidable, it would severely limit applications. Here we present the discovery that applying just moderate pressure on Cu(2)OSeO(3) substantially increases the absolute size of the skyrmion pocket. This insight demonstrates directly that tuning the electronic structure can lead to a significant enhancement of the skyrmion lattice stability. We interpret the discovery by extending the previously employed Ginzburg-Landau approach and conclude that change in the anisotropy is the main driver for control of the size of the skyrmion pocket. Nature Publishing Group 2016-02-19 /pmc/articles/PMC4759555/ /pubmed/26892190 http://dx.doi.org/10.1038/srep21347 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 Levatić, I. Popčević, P. Šurija, V. Kruchkov, A. Berger, H. Magrez, A. White, J. S. Rønnow, H. M. Živković, I. Dramatic pressure-driven enhancement of bulk skyrmion stability |
title | Dramatic pressure-driven enhancement of bulk skyrmion stability |
title_full | Dramatic pressure-driven enhancement of bulk skyrmion stability |
title_fullStr | Dramatic pressure-driven enhancement of bulk skyrmion stability |
title_full_unstemmed | Dramatic pressure-driven enhancement of bulk skyrmion stability |
title_short | Dramatic pressure-driven enhancement of bulk skyrmion stability |
title_sort | dramatic pressure-driven enhancement of bulk skyrmion stability |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4759555/ https://www.ncbi.nlm.nih.gov/pubmed/26892190 http://dx.doi.org/10.1038/srep21347 |
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