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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...

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Autores principales: 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
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
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.
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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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