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Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3)
Emerging van der Waals (vdW) magnets provide a paradise for the exploration of magnetism in the ultimate two-dimensional (2D) limit, and the construction of integrated spintronic devices, and have become a research frontier in the field of low-dimensional materials. To date, prototypical vdW magnets...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9843128/ https://www.ncbi.nlm.nih.gov/pubmed/36684515 http://dx.doi.org/10.1093/nsr/nwac173 |
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author | Zhu, Wenxuan Song, Cheng Wang, Qian Bai, Hua Yin, Siqi Pan, Feng |
author_facet | Zhu, Wenxuan Song, Cheng Wang, Qian Bai, Hua Yin, Siqi Pan, Feng |
author_sort | Zhu, Wenxuan |
collection | PubMed |
description | Emerging van der Waals (vdW) magnets provide a paradise for the exploration of magnetism in the ultimate two-dimensional (2D) limit, and the construction of integrated spintronic devices, and have become a research frontier in the field of low-dimensional materials. To date, prototypical vdW magnets based on metals of the first transition series (e.g. V, Cr, Mn and Fe) and chalcogen elements suffer from rapid oxidation restricted by the Hard-Soft-Acid-Base principle, as well as low Curie temperatures (T(C)), which has become a generally admitted challenge in 2D spintronics. Here, starting from air-unstable Cr(2)Ge(2)Te(6) vdW thin flakes, we synthesize Ge-embedded PtTe(2) (namely PtTe(2)Ge(1/3)) with superior air stability, through the displacement reaction in the Cr(2)Ge(2)Te(6)/Pt bilayer. In this process, the anomalous substitution of Cr with Pt in the thermal diffusion is inverse to the metal activity order, which can be attributed to the compatibility between soft-acid (Pt) and soft-base (Te) elements. Meanwhile, the layered uniform insertion of Ge unbalances Pt–Te bonds and introduces long-range ordered ferromagnetism with perpendicular magnetic anisotropy and a Curie temperature above room temperature. Our work demonstrates the anti-metal-activity-order reaction tendency unique in 2D transition-metal magnets and boosts progress towards practical 2D spintronics. |
format | Online Article Text |
id | pubmed-9843128 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-98431282023-01-19 Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) Zhu, Wenxuan Song, Cheng Wang, Qian Bai, Hua Yin, Siqi Pan, Feng Natl Sci Rev Research Article Emerging van der Waals (vdW) magnets provide a paradise for the exploration of magnetism in the ultimate two-dimensional (2D) limit, and the construction of integrated spintronic devices, and have become a research frontier in the field of low-dimensional materials. To date, prototypical vdW magnets based on metals of the first transition series (e.g. V, Cr, Mn and Fe) and chalcogen elements suffer from rapid oxidation restricted by the Hard-Soft-Acid-Base principle, as well as low Curie temperatures (T(C)), which has become a generally admitted challenge in 2D spintronics. Here, starting from air-unstable Cr(2)Ge(2)Te(6) vdW thin flakes, we synthesize Ge-embedded PtTe(2) (namely PtTe(2)Ge(1/3)) with superior air stability, through the displacement reaction in the Cr(2)Ge(2)Te(6)/Pt bilayer. In this process, the anomalous substitution of Cr with Pt in the thermal diffusion is inverse to the metal activity order, which can be attributed to the compatibility between soft-acid (Pt) and soft-base (Te) elements. Meanwhile, the layered uniform insertion of Ge unbalances Pt–Te bonds and introduces long-range ordered ferromagnetism with perpendicular magnetic anisotropy and a Curie temperature above room temperature. Our work demonstrates the anti-metal-activity-order reaction tendency unique in 2D transition-metal magnets and boosts progress towards practical 2D spintronics. Oxford University Press 2022-08-18 /pmc/articles/PMC9843128/ /pubmed/36684515 http://dx.doi.org/10.1093/nsr/nwac173 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Zhu, Wenxuan Song, Cheng Wang, Qian Bai, Hua Yin, Siqi Pan, Feng Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title | Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title_full | Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title_fullStr | Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title_full_unstemmed | Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title_short | Anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe(2)Ge(1/3) |
title_sort | anomalous displacement reaction for synthesizing above-room-temperature and air-stable vdw ferromagnet ptte(2)ge(1/3) |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9843128/ https://www.ncbi.nlm.nih.gov/pubmed/36684515 http://dx.doi.org/10.1093/nsr/nwac173 |
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