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Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films
Transition metal oxides are promising candidates for the next generation of spintronic devices due to their fascinating properties that can be effectively engineered by strain, defects, and microstructure. An excellent example can be found in ferroelastic LaCoO(3) with paramagnetism in bulk. In cont...
Autores principales: | , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10279738/ https://www.ncbi.nlm.nih.gov/pubmed/37336926 http://dx.doi.org/10.1038/s41467-023-39369-6 |
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author | Li, Dong Wang, Hongguang Li, Kaifeng Zhu, Bonan Jiang, Kai Backes, Dirk Veiga, Larissa S. I. Shi, Jueli Roy, Pinku Xiao, Ming Chen, Aiping Jia, Quanxi Lee, Tien-Lin Dhesi, Sarnjeet S. Scanlon, David O. MacManus-Driscoll, Judith L. van Aken, Peter A. Zhang, Kelvin H. L. Li, Weiwei |
author_facet | Li, Dong Wang, Hongguang Li, Kaifeng Zhu, Bonan Jiang, Kai Backes, Dirk Veiga, Larissa S. I. Shi, Jueli Roy, Pinku Xiao, Ming Chen, Aiping Jia, Quanxi Lee, Tien-Lin Dhesi, Sarnjeet S. Scanlon, David O. MacManus-Driscoll, Judith L. van Aken, Peter A. Zhang, Kelvin H. L. Li, Weiwei |
author_sort | Li, Dong |
collection | PubMed |
description | Transition metal oxides are promising candidates for the next generation of spintronic devices due to their fascinating properties that can be effectively engineered by strain, defects, and microstructure. An excellent example can be found in ferroelastic LaCoO(3) with paramagnetism in bulk. In contrast, unexpected ferromagnetism is observed in tensile-strained LaCoO(3) films, however, its origin remains controversial. Here we simultaneously reveal the formation of ordered oxygen vacancies and previously unreported long-range suppression of CoO(6) octahedral rotations throughout LaCoO(3) films. Supported by density functional theory calculations, we find that the strong modification of Co 3d-O 2p hybridization associated with the increase of both Co-O-Co bond angle and Co-O bond length weakens the crystal-field splitting and facilitates an ordered high-spin state of Co ions, inducing an emergent ferromagnetic-insulating state. Our work provides unique insights into underlying mechanisms driving the ferromagnetic-insulating state in tensile-strained ferroelastic LaCoO(3) films while suggesting potential applications toward low-power spintronic devices. |
format | Online Article Text |
id | pubmed-10279738 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-102797382023-06-21 Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films Li, Dong Wang, Hongguang Li, Kaifeng Zhu, Bonan Jiang, Kai Backes, Dirk Veiga, Larissa S. I. Shi, Jueli Roy, Pinku Xiao, Ming Chen, Aiping Jia, Quanxi Lee, Tien-Lin Dhesi, Sarnjeet S. Scanlon, David O. MacManus-Driscoll, Judith L. van Aken, Peter A. Zhang, Kelvin H. L. Li, Weiwei Nat Commun Article Transition metal oxides are promising candidates for the next generation of spintronic devices due to their fascinating properties that can be effectively engineered by strain, defects, and microstructure. An excellent example can be found in ferroelastic LaCoO(3) with paramagnetism in bulk. In contrast, unexpected ferromagnetism is observed in tensile-strained LaCoO(3) films, however, its origin remains controversial. Here we simultaneously reveal the formation of ordered oxygen vacancies and previously unreported long-range suppression of CoO(6) octahedral rotations throughout LaCoO(3) films. Supported by density functional theory calculations, we find that the strong modification of Co 3d-O 2p hybridization associated with the increase of both Co-O-Co bond angle and Co-O bond length weakens the crystal-field splitting and facilitates an ordered high-spin state of Co ions, inducing an emergent ferromagnetic-insulating state. Our work provides unique insights into underlying mechanisms driving the ferromagnetic-insulating state in tensile-strained ferroelastic LaCoO(3) films while suggesting potential applications toward low-power spintronic devices. Nature Publishing Group UK 2023-06-19 /pmc/articles/PMC10279738/ /pubmed/37336926 http://dx.doi.org/10.1038/s41467-023-39369-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Li, Dong Wang, Hongguang Li, Kaifeng Zhu, Bonan Jiang, Kai Backes, Dirk Veiga, Larissa S. I. Shi, Jueli Roy, Pinku Xiao, Ming Chen, Aiping Jia, Quanxi Lee, Tien-Lin Dhesi, Sarnjeet S. Scanlon, David O. MacManus-Driscoll, Judith L. van Aken, Peter A. Zhang, Kelvin H. L. Li, Weiwei Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title | Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title_full | Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title_fullStr | Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title_full_unstemmed | Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title_short | Emergent and robust ferromagnetic-insulating state in highly strained ferroelastic LaCoO(3) thin films |
title_sort | emergent and robust ferromagnetic-insulating state in highly strained ferroelastic lacoo(3) thin films |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10279738/ https://www.ncbi.nlm.nih.gov/pubmed/37336926 http://dx.doi.org/10.1038/s41467-023-39369-6 |
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