Muon spectroscopy investigation of anomalous dynamic magnetism in NiI$_2$
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913672188657664 |
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| author | Breeze, T. L. Huddart, B. M. Hernández-Melián, A. Bentley, N. P. Mayoh, D. A. Wood, G. D. A. Balakrishnan, G. Wilkinson, J. Pratt, F. L. Hicken, T. J. Clark, S. J. Lancaster, T. |
| author_facet | Breeze, T. L. Huddart, B. M. Hernández-Melián, A. Bentley, N. P. Mayoh, D. A. Wood, G. D. A. Balakrishnan, G. Wilkinson, J. Pratt, F. L. Hicken, T. J. Clark, S. J. Lancaster, T. |
| contents | We present the results of muon-spin relaxation ($μ^{+}$SR) measurements of the van der Waals magnet NiI$_2$, which probe magnetic phase transitions at $T_{\mathrm{N1}}=73$~K and $T_{\mathrm{N2}}=60$~K. Supporting density functional theory (DFT) calculations allow the determination of a single muon stopping site whose magnetic environment is consistent with the proposed ground-state magnetic structure. $μ^{+}$SR measurements of the dynamics reveal behavior consistent with spin-wave excitations below $T_{\mathrm{N2}}$. In the region $T_{\mathrm{N2}}<T<T_{\mathrm{N1}}$ the character of the dynamics changes qualitatively, resulting in an unusual region of temperature-independent fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_04469 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Muon spectroscopy investigation of anomalous dynamic magnetism in NiI$_2$ Breeze, T. L. Huddart, B. M. Hernández-Melián, A. Bentley, N. P. Mayoh, D. A. Wood, G. D. A. Balakrishnan, G. Wilkinson, J. Pratt, F. L. Hicken, T. J. Clark, S. J. Lancaster, T. Strongly Correlated Electrons We present the results of muon-spin relaxation ($μ^{+}$SR) measurements of the van der Waals magnet NiI$_2$, which probe magnetic phase transitions at $T_{\mathrm{N1}}=73$~K and $T_{\mathrm{N2}}=60$~K. Supporting density functional theory (DFT) calculations allow the determination of a single muon stopping site whose magnetic environment is consistent with the proposed ground-state magnetic structure. $μ^{+}$SR measurements of the dynamics reveal behavior consistent with spin-wave excitations below $T_{\mathrm{N2}}$. In the region $T_{\mathrm{N2}}<T<T_{\mathrm{N1}}$ the character of the dynamics changes qualitatively, resulting in an unusual region of temperature-independent fluctuations. |
| title | Muon spectroscopy investigation of anomalous dynamic magnetism in NiI$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.04469 |