Competing interactions and the effects of uniaxial out-of-plane perturbations in the honeycomb antiferromagnet Na2Co2TeO6
Despite exhibiting magnetic long-range order below 𝑇N=26.7K, the honeycomb cobaltate Na2Co2TeO6 is predicted to enter a Kitaev spin liquid state when subjected to small external perturbations. While most of the reported literature investigates the effects of magnetic fields applied parallel to the...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
September 2025
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| In: |
Physical review materials
Year: 2025, Jahrgang: 9, Heft: 9, Pages: 094001-1-094001-9 |
| ISSN: | 2475-9953 |
| DOI: | 10.1103/gxyn-xqdv |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/gxyn-xqdv Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/gxyn-xqdv 
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| Verfasserangaben: | J. Arneth, R. Kalaivanan, R. Sankar, K.-Y. Choi, and R. Klingeler |
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| 245 | 1 | 0 | |a Competing interactions and the effects of uniaxial out-of-plane perturbations in the honeycomb antiferromagnet Na2Co2TeO6 |c J. Arneth, R. Kalaivanan, R. Sankar, K.-Y. Choi, and R. Klingeler |
| 246 | 3 | 3 | |a Competing interactions and the effects of uniaxial out-of-plane perturbations in the honeycomb antiferromagnet Na 2 Co 2 TeO 6 |
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| 520 | |a Despite exhibiting magnetic long-range order below N=26.7K, the honeycomb cobaltate Na2Co2TeO6 is predicted to enter a Kitaev spin liquid state when subjected to small external perturbations. While most of the reported literature investigates the effects of magnetic fields applied parallel to the honeycomb layers, we present high-resolution capacitance dilatometry studies for fields perpendicular to the Co-planes up to 15 T. Grüneisen analysis reveals the effect of uniaxial out-of-plane strain and shows that antiferromagnetic order in Na2Co2TeO6 is stabilized at a rate of N/c=0.28(5) K/GPa. Further, failure of the Grüneisen scaling at low temperatures around cr≃7.5K demonstrates the presence of competing energy scales. In contrast to an only weak field dependence of the anomaly at N, a broad hump at cr(=0T) evolves into a sharp peak at high fields applied ∥. Our magnetostriction data show that a kink in the magnetization at C≃4.6T is accompanied by an inflection point in the field-induced length changes, which is likely related to weak unequal spin canting. All observed phenomena leave their signatures in the magnetoelastic phase diagram as constructed by our experimental results. | ||
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