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Terahertz Spin Current Dynamics in Antiferromagnetic Hematite
An important vision of modern magnetic research is to use antiferromagnets (AFMs) as controllable and active ultrafast components in spintronic devices. Hematite (α‐Fe(2)O(3)) is a promising model material in this respect because its pronounced Dzyaloshinskii‐Moriya interaction leads to the coexiste...
Autores principales: | , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288251/ https://www.ncbi.nlm.nih.gov/pubmed/37083225 http://dx.doi.org/10.1002/advs.202300512 |
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author | Qiu, Hongsong Seifert, Tom S. Huang, Lin Zhou, Yongjian Kašpar, Zdeněk Zhang, Caihong Wu, Jingbo Fan, Kebin Zhang, Qi Wu, Di Kampfrath, Tobias Song, Cheng Jin, Biaobing Chen, Jian Wu, Peiheng |
author_facet | Qiu, Hongsong Seifert, Tom S. Huang, Lin Zhou, Yongjian Kašpar, Zdeněk Zhang, Caihong Wu, Jingbo Fan, Kebin Zhang, Qi Wu, Di Kampfrath, Tobias Song, Cheng Jin, Biaobing Chen, Jian Wu, Peiheng |
author_sort | Qiu, Hongsong |
collection | PubMed |
description | An important vision of modern magnetic research is to use antiferromagnets (AFMs) as controllable and active ultrafast components in spintronic devices. Hematite (α‐Fe(2)O(3)) is a promising model material in this respect because its pronounced Dzyaloshinskii‐Moriya interaction leads to the coexistence of antiferromagnetism and weak ferromagnetism. Here, femtosecond laser pulses are used to drive terahertz (THz) spin currents from α‐Fe(2)O(3) into an adjacent Pt layer. Two contributions to the generation of the spin current with distinctly different dynamics are found: the impulsive stimulated Raman scatting that relies on the AFM order and the ultrafast spin Seebeck effect that relies on the net magnetization. The total THz spin current dynamics can be manipulated by a medium‐strength magnetic field below 1 T. The control of the THz spin current achieved in α‐Fe(2)O(3) opens the pathway toward tailoring the exact spin current dynamics from ultrafast AFM spin sources. |
format | Online Article Text |
id | pubmed-10288251 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-102882512023-06-24 Terahertz Spin Current Dynamics in Antiferromagnetic Hematite Qiu, Hongsong Seifert, Tom S. Huang, Lin Zhou, Yongjian Kašpar, Zdeněk Zhang, Caihong Wu, Jingbo Fan, Kebin Zhang, Qi Wu, Di Kampfrath, Tobias Song, Cheng Jin, Biaobing Chen, Jian Wu, Peiheng Adv Sci (Weinh) Research Articles An important vision of modern magnetic research is to use antiferromagnets (AFMs) as controllable and active ultrafast components in spintronic devices. Hematite (α‐Fe(2)O(3)) is a promising model material in this respect because its pronounced Dzyaloshinskii‐Moriya interaction leads to the coexistence of antiferromagnetism and weak ferromagnetism. Here, femtosecond laser pulses are used to drive terahertz (THz) spin currents from α‐Fe(2)O(3) into an adjacent Pt layer. Two contributions to the generation of the spin current with distinctly different dynamics are found: the impulsive stimulated Raman scatting that relies on the AFM order and the ultrafast spin Seebeck effect that relies on the net magnetization. The total THz spin current dynamics can be manipulated by a medium‐strength magnetic field below 1 T. The control of the THz spin current achieved in α‐Fe(2)O(3) opens the pathway toward tailoring the exact spin current dynamics from ultrafast AFM spin sources. John Wiley and Sons Inc. 2023-04-21 /pmc/articles/PMC10288251/ /pubmed/37083225 http://dx.doi.org/10.1002/advs.202300512 Text en © 2023 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Qiu, Hongsong Seifert, Tom S. Huang, Lin Zhou, Yongjian Kašpar, Zdeněk Zhang, Caihong Wu, Jingbo Fan, Kebin Zhang, Qi Wu, Di Kampfrath, Tobias Song, Cheng Jin, Biaobing Chen, Jian Wu, Peiheng Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title | Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title_full | Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title_fullStr | Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title_full_unstemmed | Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title_short | Terahertz Spin Current Dynamics in Antiferromagnetic Hematite |
title_sort | terahertz spin current dynamics in antiferromagnetic hematite |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288251/ https://www.ncbi.nlm.nih.gov/pubmed/37083225 http://dx.doi.org/10.1002/advs.202300512 |
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