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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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
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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| Summary: | 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. |
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| ISSN: | 2045-2322 |