Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4
Abstract We report the synthesis, crystal structure, and magnetic properties of a new Kitaev honeycomb cobaltate, KCoAsO4, which crystallizes in two distinct forms: P2/c and R $$\overline{3 }$$ space groups. Magnetic measurements reveal ordering temperatures of ~ 14 K for the P2/c structure and ~ 10...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-86302-6 |
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| author | Yuya Haraguchi Daisuke Nishio-Hamane Hiroko Aruga Katori |
| author_facet | Yuya Haraguchi Daisuke Nishio-Hamane Hiroko Aruga Katori |
| author_sort | Yuya Haraguchi |
| collection | DOAJ |
| description | Abstract We report the synthesis, crystal structure, and magnetic properties of a new Kitaev honeycomb cobaltate, KCoAsO4, which crystallizes in two distinct forms: P2/c and R $$\overline{3 }$$ space groups. Magnetic measurements reveal ordering temperatures of ~ 14 K for the P2/c structure and ~ 10.5 K for the R $$\overline{3 }$$ structure. The P2/c-type KCoAsO4 sample exhibits a complex temperature-field phase diagram, including a field-induced phase, while the R $$\overline{3 }$$ -type KCoAsO4 shows a simpler phase diagram with a single magnetically ordered phase. The observed differences in magnetic properties are attributed to subtle structural variations, strongly suggesting that local structural changes play a crucial role in determining the magnetism of cobaltate-based Kitaev materials. |
| format | Article |
| id | doaj-art-1086a76a3c0b4dd9b9caa9d824679b54 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-1086a76a3c0b4dd9b9caa9d824679b542025-01-26T12:26:16ZengNature PortfolioScientific Reports2045-23222025-01-011511810.1038/s41598-025-86302-6Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4Yuya Haraguchi0Daisuke Nishio-Hamane1Hiroko Aruga Katori2Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and TechnologyThe Institute for Solid State Physics, The University of TokyoDepartment of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and TechnologyAbstract We report the synthesis, crystal structure, and magnetic properties of a new Kitaev honeycomb cobaltate, KCoAsO4, which crystallizes in two distinct forms: P2/c and R $$\overline{3 }$$ space groups. Magnetic measurements reveal ordering temperatures of ~ 14 K for the P2/c structure and ~ 10.5 K for the R $$\overline{3 }$$ structure. The P2/c-type KCoAsO4 sample exhibits a complex temperature-field phase diagram, including a field-induced phase, while the R $$\overline{3 }$$ -type KCoAsO4 shows a simpler phase diagram with a single magnetically ordered phase. The observed differences in magnetic properties are attributed to subtle structural variations, strongly suggesting that local structural changes play a crucial role in determining the magnetism of cobaltate-based Kitaev materials.https://doi.org/10.1038/s41598-025-86302-6 |
| spellingShingle | Yuya Haraguchi Daisuke Nishio-Hamane Hiroko Aruga Katori Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 Scientific Reports |
| title | Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 |
| title_full | Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 |
| title_fullStr | Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 |
| title_full_unstemmed | Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 |
| title_short | Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4 |
| title_sort | polymorphism and magnetism in a kitaev honeycomb cobaltate kcoaso4 |
| url | https://doi.org/10.1038/s41598-025-86302-6 |
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