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Tracking the ultrafast motion of an antiferromagnetic order parameter
The unique functionalities of antiferromagnets offer promising routes to advance information technology. Their compensated magnetic order leads to spin resonances in the THz-regime, which suggest the possibility to coherently control antiferromagnetic (AFM) devices orders of magnitude faster than tr...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6728322/ https://www.ncbi.nlm.nih.gov/pubmed/31488834 http://dx.doi.org/10.1038/s41467-019-11961-9 |
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author | Tzschaschel, Christian Satoh, Takuya Fiebig, Manfred |
author_facet | Tzschaschel, Christian Satoh, Takuya Fiebig, Manfred |
author_sort | Tzschaschel, Christian |
collection | PubMed |
description | The unique functionalities of antiferromagnets offer promising routes to advance information technology. Their compensated magnetic order leads to spin resonances in the THz-regime, which suggest the possibility to coherently control antiferromagnetic (AFM) devices orders of magnitude faster than traditional electronics. However, the required time resolution, complex sublattice interactions and the relative inaccessibility of the AFM order parameter pose serious challenges to studying AFM spin dynamics. Here, we reveal the temporal evolution of an AFM order parameter directly in the time domain. We modulate the AFM order in hexagonal YMnO(3) by coherent magnon excitation and track the ensuing motion of the AFM order parameter using time-resolved optical second-harmonic generation. The dynamic symmetry reduction by the moving order parameter allows us to separate electron dynamics from spin dynamics. As transient symmetry reductions are common to coherent excitations, we have a general tool for tracking the ultrafast motion of an AFM order parameter. |
format | Online Article Text |
id | pubmed-6728322 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-67283222019-09-09 Tracking the ultrafast motion of an antiferromagnetic order parameter Tzschaschel, Christian Satoh, Takuya Fiebig, Manfred Nat Commun Article The unique functionalities of antiferromagnets offer promising routes to advance information technology. Their compensated magnetic order leads to spin resonances in the THz-regime, which suggest the possibility to coherently control antiferromagnetic (AFM) devices orders of magnitude faster than traditional electronics. However, the required time resolution, complex sublattice interactions and the relative inaccessibility of the AFM order parameter pose serious challenges to studying AFM spin dynamics. Here, we reveal the temporal evolution of an AFM order parameter directly in the time domain. We modulate the AFM order in hexagonal YMnO(3) by coherent magnon excitation and track the ensuing motion of the AFM order parameter using time-resolved optical second-harmonic generation. The dynamic symmetry reduction by the moving order parameter allows us to separate electron dynamics from spin dynamics. As transient symmetry reductions are common to coherent excitations, we have a general tool for tracking the ultrafast motion of an AFM order parameter. Nature Publishing Group UK 2019-09-05 /pmc/articles/PMC6728322/ /pubmed/31488834 http://dx.doi.org/10.1038/s41467-019-11961-9 Text en © The Author(s) 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 Tzschaschel, Christian Satoh, Takuya Fiebig, Manfred Tracking the ultrafast motion of an antiferromagnetic order parameter |
title | Tracking the ultrafast motion of an antiferromagnetic order parameter |
title_full | Tracking the ultrafast motion of an antiferromagnetic order parameter |
title_fullStr | Tracking the ultrafast motion of an antiferromagnetic order parameter |
title_full_unstemmed | Tracking the ultrafast motion of an antiferromagnetic order parameter |
title_short | Tracking the ultrafast motion of an antiferromagnetic order parameter |
title_sort | tracking the ultrafast motion of an antiferromagnetic order parameter |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6728322/ https://www.ncbi.nlm.nih.gov/pubmed/31488834 http://dx.doi.org/10.1038/s41467-019-11961-9 |
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