Antiferromagnetic domains in a single crystal of the A-type spin-7/2 trigonal topological insulator EuSn$_2$As$_2$
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917624666914816 |
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| author | Pakhira, Santanu Johnston, D. C. |
| author_facet | Pakhira, Santanu Johnston, D. C. |
| contents | EuSn$_2$As$_2$ is a trigonal A-type antiferromagnetic topological insulator with the moments aligned in the $ab$ plane and with a Néel temperature $T_{\rm N} = 23.5$ K. Here we report that an EuSn$_2$As$_2$ crystal exhibits a broad peak at $H_{\rm c1} = 1100$ Oe in the field derivative $dM_{ab}/dH$ of the $ab$-plane magnetization $M_{ab}(H)$ at temperature $T=2$ K, demonstrating the presence of trigonal antiferromagnetic domains. We model these $M_{ab}(H,\,T=2\,{\rm K})$ data and obtain the trigonal anisotropy-energy coefficient $K_3$ that is 13.3 and 3.7 times larger than those we previously reported for single crystals of the trigonal compounds EuMg$_2$Sb$_2$ and EuMg$_2$Bi$_2$, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_19013 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Antiferromagnetic domains in a single crystal of the A-type spin-7/2 trigonal topological insulator EuSn$_2$As$_2$ Pakhira, Santanu Johnston, D. C. Strongly Correlated Electrons EuSn$_2$As$_2$ is a trigonal A-type antiferromagnetic topological insulator with the moments aligned in the $ab$ plane and with a Néel temperature $T_{\rm N} = 23.5$ K. Here we report that an EuSn$_2$As$_2$ crystal exhibits a broad peak at $H_{\rm c1} = 1100$ Oe in the field derivative $dM_{ab}/dH$ of the $ab$-plane magnetization $M_{ab}(H)$ at temperature $T=2$ K, demonstrating the presence of trigonal antiferromagnetic domains. We model these $M_{ab}(H,\,T=2\,{\rm K})$ data and obtain the trigonal anisotropy-energy coefficient $K_3$ that is 13.3 and 3.7 times larger than those we previously reported for single crystals of the trigonal compounds EuMg$_2$Sb$_2$ and EuMg$_2$Bi$_2$, respectively. |
| title | Antiferromagnetic domains in a single crystal of the A-type spin-7/2 trigonal topological insulator EuSn$_2$As$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2403.19013 |