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Sub-domain structure in a single crystal of the magnetic topological insulator MnSb2Te4
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Sub-domain structure in a single crystal of the magnetic topological insulator MnSb2Te4
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Sub-domain structure in a single crystal of the magnetic topological insulator MnSb2Te4
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Paper
Sub-domain structure in a single crystal of the magnetic topological insulator MnSb2Te4
2026
Overview
The domain structure of a MnSb\\(_2\\)Te\\(_4\\) single crystal with a Curie temperature \\(T_C \\approx 45~K\\) was studied using the high-resolution Bitter decoration technique. Magnetotransport measurements confirm a soft ferromagnetic ordering with a coercive field of \\( \\sim 100\\) Oe. We revealed the formation of a hierarchical domain structure characterized by two distinct spatial scales. These results indicate the existence of two magnetically weakly coupled subsystems -- surface and bulk. The observed sub-domain structure can be attributed to the formation of a ferromagnetic well due to an inhomogeneous distribution of \\(\\mathrm{Mn_{Sb}}\\) antisite defects, with an additional contribution from symmetry breaking in the near-surface layer.
Publisher
Cornell University Library, arXiv.org
