Magnetism and topology in Tb-based icosahedral quasicrystal

Abstract Quasicrystal (QC) possesses a unique lattice structure with rotational symmetry forbidden in conventional crystals. The electric property is far from complete understanding and it has been a long-standing issue whether the magnetic long-range order is realized in the QC. The main difficulty...

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Autor principal:	Shinji Watanabe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dd4a9ea7fff24e0e989d3566630aedc4
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spelling	oai:doaj.org-article:dd4a9ea7fff24e0e989d3566630aedc42021-12-02T15:29:02ZMagnetism and topology in Tb-based icosahedral quasicrystal10.1038/s41598-021-97024-w2045-2322https://doaj.org/article/dd4a9ea7fff24e0e989d3566630aedc42021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97024-whttps://doaj.org/toc/2045-2322Abstract Quasicrystal (QC) possesses a unique lattice structure with rotational symmetry forbidden in conventional crystals. The electric property is far from complete understanding and it has been a long-standing issue whether the magnetic long-range order is realized in the QC. The main difficulty was lack of microscopic theory to analyze the effect of the crystalline electric field (CEF) at the rare-earth atom in QCs. Here we show the full microscopic analysis of the CEF in Tb-based QCs. We find that magnetic anisotropy arising from the CEF plays a key role in realizing unique magnetic textures on the icosahedron whose vertices Tb atoms are located at. Our analysis of the minimal model based on the magnetic anisotropy suggests that the long-range order of the hedgehog characterized by the topological charge of one is stabilized in the Tb-based QC. We also find that the whirling-moment state is characterized by unusually large topological charge of three. The magnetic textures as well as the topological states are shown to be switched by controlling compositions of the non-rare-earth elements in the ternary compounds. Our model is useful to understand the magnetism as well as the topological property in the rare-earth-based QCs and approximant crystals.Shinji WatanabeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shinji Watanabe Magnetism and topology in Tb-based icosahedral quasicrystal
description	Abstract Quasicrystal (QC) possesses a unique lattice structure with rotational symmetry forbidden in conventional crystals. The electric property is far from complete understanding and it has been a long-standing issue whether the magnetic long-range order is realized in the QC. The main difficulty was lack of microscopic theory to analyze the effect of the crystalline electric field (CEF) at the rare-earth atom in QCs. Here we show the full microscopic analysis of the CEF in Tb-based QCs. We find that magnetic anisotropy arising from the CEF plays a key role in realizing unique magnetic textures on the icosahedron whose vertices Tb atoms are located at. Our analysis of the minimal model based on the magnetic anisotropy suggests that the long-range order of the hedgehog characterized by the topological charge of one is stabilized in the Tb-based QC. We also find that the whirling-moment state is characterized by unusually large topological charge of three. The magnetic textures as well as the topological states are shown to be switched by controlling compositions of the non-rare-earth elements in the ternary compounds. Our model is useful to understand the magnetism as well as the topological property in the rare-earth-based QCs and approximant crystals.
format	article
author	Shinji Watanabe
author_facet	Shinji Watanabe
author_sort	Shinji Watanabe
title	Magnetism and topology in Tb-based icosahedral quasicrystal
title_short	Magnetism and topology in Tb-based icosahedral quasicrystal
title_full	Magnetism and topology in Tb-based icosahedral quasicrystal
title_fullStr	Magnetism and topology in Tb-based icosahedral quasicrystal
title_full_unstemmed	Magnetism and topology in Tb-based icosahedral quasicrystal
title_sort	magnetism and topology in tb-based icosahedral quasicrystal
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dd4a9ea7fff24e0e989d3566630aedc4
work_keys_str_mv	AT shinjiwatanabe magnetismandtopologyintbbasedicosahedralquasicrystal
_version_	1718387173629100032

Magnetism and topology in Tb-based icosahedral quasicrystal

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