Unusual Multiple Magnetic Transitions and Anomalous Hall Effect Observed in Antiferromagnetic Weyl Semimetal, Mn$_{2.94}$Ge (Ge-rich)
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910335924961280 |
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| author | Ghosh, Susanta Low, Achintya Changdar, Susmita Purwar, Shubham Thirupathaiah, Setti |
| author_facet | Ghosh, Susanta Low, Achintya Changdar, Susmita Purwar, Shubham Thirupathaiah, Setti |
| contents | We report on the magnetic and Hall effect measurements of the magnetic Weyl semimetal, Mn$_{2.94}$Ge (Ge-rich) single crystal. From the magnetic properties study, we identify unusual multiple magnetic transitions below the N$\acute{e}$el temperature of 353 K, such as the spin-reorientation ($T_{SR}$) and ferromagnetic-like transitions. Consistent with the magnetic properties, the Hall effect study shows unusual behavior around the spin-reorientation transition. Specifically, the anomalous Hall conductivity (AHC) increases with increasing temperature, reaching a maximum at $T_{SR}$, which then gradually decreases with increasing temperature. This observation is quite in contrast to the Mn$_{3+δ}$Ge (Mn-rich) system, though both compositions share the same hexagonal crystal symmetry. This study unravels the sensitivity of magnetic and topological properties on the Mn concentration. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_11923 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unusual Multiple Magnetic Transitions and Anomalous Hall Effect Observed in Antiferromagnetic Weyl Semimetal, Mn$_{2.94}$Ge (Ge-rich) Ghosh, Susanta Low, Achintya Changdar, Susmita Purwar, Shubham Thirupathaiah, Setti Materials Science We report on the magnetic and Hall effect measurements of the magnetic Weyl semimetal, Mn$_{2.94}$Ge (Ge-rich) single crystal. From the magnetic properties study, we identify unusual multiple magnetic transitions below the N$\acute{e}$el temperature of 353 K, such as the spin-reorientation ($T_{SR}$) and ferromagnetic-like transitions. Consistent with the magnetic properties, the Hall effect study shows unusual behavior around the spin-reorientation transition. Specifically, the anomalous Hall conductivity (AHC) increases with increasing temperature, reaching a maximum at $T_{SR}$, which then gradually decreases with increasing temperature. This observation is quite in contrast to the Mn$_{3+δ}$Ge (Mn-rich) system, though both compositions share the same hexagonal crystal symmetry. This study unravels the sensitivity of magnetic and topological properties on the Mn concentration. |
| title | Unusual Multiple Magnetic Transitions and Anomalous Hall Effect Observed in Antiferromagnetic Weyl Semimetal, Mn$_{2.94}$Ge (Ge-rich) |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.11923 |