Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929454968733696 |
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| author | Ueno, Masato Kurumaji, Takashi Kitou, Shunsuke Gen, Masaki Nakamura, Yuiga Tokunaga, Yusuke Arima, Taka-hisa |
| author_facet | Ueno, Masato Kurumaji, Takashi Kitou, Shunsuke Gen, Masaki Nakamura, Yuiga Tokunaga, Yusuke Arima, Taka-hisa |
| contents | Honeycomb-lattice antiferromagnets have attracted wide attention for exploration of exotic heat transport and their interplay with magnetic excitations. In this work, we have revealed a contrasting behavior in the magneto-thermal conductivity (MTC) between two Co-based honeycomb-lattice magnets Co4M2O9 (M = Nb, Ta), despite their identical lattice structures and quite similar magnetism. Co4Ta2O9 exhibits enhanced MTC of about 550% at 9 T of an in-plane magnetic field, comparable to other honeycomb-magnets, while MTC for Co4Nb2O9 reaches only ~30%. This marked difference is ascribed to distinct features in the field-induced evolution of magnetic excitations that resonantly scatter phonons. This finding sheds light on implicit impacts of non-magnetic ions on thermal transport, and hints at the potential for broad heat-transport tunability while preserving magnetism and lattice structures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_00963 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets Ueno, Masato Kurumaji, Takashi Kitou, Shunsuke Gen, Masaki Nakamura, Yuiga Tokunaga, Yusuke Arima, Taka-hisa Strongly Correlated Electrons Materials Science Honeycomb-lattice antiferromagnets have attracted wide attention for exploration of exotic heat transport and their interplay with magnetic excitations. In this work, we have revealed a contrasting behavior in the magneto-thermal conductivity (MTC) between two Co-based honeycomb-lattice magnets Co4M2O9 (M = Nb, Ta), despite their identical lattice structures and quite similar magnetism. Co4Ta2O9 exhibits enhanced MTC of about 550% at 9 T of an in-plane magnetic field, comparable to other honeycomb-magnets, while MTC for Co4Nb2O9 reaches only ~30%. This marked difference is ascribed to distinct features in the field-induced evolution of magnetic excitations that resonantly scatter phonons. This finding sheds light on implicit impacts of non-magnetic ions on thermal transport, and hints at the potential for broad heat-transport tunability while preserving magnetism and lattice structures. |
| title | Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2407.00963 |