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Spin glass state in layered compound MnSb2Te4

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arxiv 2104.00898 v1 pith:L3HPLKDS submitted 2021-04-02 cond-mat.mtrl-sci

Hao Li , Yaoxin Li , Yu-Kun Lian , Weiwei Xie , Ling Chen , Jinsong Zhang , Yang Wu , Shoushan Fan This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords mnsb2te4mnbi2te4antiferromagneticantisitecompoundcrystalsdefectsglass
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As a sister compound and isostructural of MnBi2Te4, the high quality MnSb2Te4 single crystals are grown via solid-state reaction where prolonged annealing and narrow temperature window play critical roles on account of its thermal metastability. X-ray diffraction analysis on MnSb2Te4 single crystals reveals pronounced cation intermixing, 28.9(7)% Sb antisite defects on the Mn (3a) site and 19.3(6)% Mn antisite defects on the Sb (6c) site, compared with MnBi2Te4. Unlike antiferromagnetic (AFM) nature MnBi2Te4, MnSb2Te4 contains magnetic and antiferromagnetic competition and exhibits a spin glass (SG) state below 24 K. Its magnetic hysteresis, anisotropy, and relaxation process are investigated in detail with DC and AC magnetization measurements. Moreover, anomalous Hall effect as a p-type conductor is demonstrated through transport measurements. This work grants MnSb2Te4 a possible access to the future exploration of exotic quantum physics by removing the odd/even layer number restraint in intrinsic AFM MnBi2Te4-family materials as a result of the crossover between its magnetism and potential topology in the Sb-Te layer.

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  1. Phase equilibria in MnSb2Te4-GeSb2Te4 system and magnetic properties of Mn1-xGexSb2Te4 solid solutions

    cond-mat.mtrl-sci 2026-07 conditional novelty 6.0 of 10

    Full-range Ge substitution in MnSb2Te4 preserves a single phase and systematically weakens magnetic order, producing two magnetic transitions and a dome-shaped low-temperature phase boundary.

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