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glassy magnetic ground state in layered compound MnSb_(2)Te_(4)

Science China Materials 2022年第2期65卷 477-485页

作者： Hao Li Yaoxin Li Yukun Lian Weiwei Xie Ling Chen Jinsong Zhang Yang Wu Shoushan Fan School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China state Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Department of Chemistry and Chemical Biology Rutgers UniversityPiscataway 08854USA Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China

As a sister compound of MnBi_(2)Te_(4),the highquality MnSb_(2)Te_(4) single crystals are grown via solid-state reaction where prolonged annealing and narrow temperature window play critical roles on account of its thermal ***-crystal X-ray diffraction(SCXRD)analysis on MnSb_(2)Te_(4) illustrates a crystal model that is isostructural to MnBi_(2)Te_(4),consisting of Te-Sb-Te-Mn-Te-Sb-Te septuple layers(SLs)stacking in an ABC ***,MnSb_(2)Te_(4) reveals a more pronounced cation intermixing in comparison with MnBi_(2)Te_(4),comprising 28.9(7)%Sb antisite defects on the Mn(3a)site and 19.3(6)%Mn antisite defects on the Sb(6c)site,which may give rise to novel magnetic properties in emerging layered MnBi_(2)Te_(4)-family *** the antiferromagnetic(AFM)nature in MnBi_(2)Te_(4),MnSb_(2)Te_(4) exhibits a glassy magnetic ground state below 24 K and can be easily tuned to a ferromagnetic state under a weak applied magnetic *** magnetic hysteresis,anisotropy,and relaxation process are investigated in detail via static and dynamic magnetization ***,anomalous Hall effect as a p-type conductor is demonstrated with transport *** work grants MnSb_(2)Te_(4) a possible access to the future exploration of exotic quantum physics by removing the odd/even layer number restraint in realizing quantum transport phenomena in intrinsic AFM MnBi_(2)Te_(4)-family materials,as a result of the crossover between its magnetism and potential topology arising from the Sb-Te layer.

关键词： MnSb2Te4 crystal growth glassy magnetic ground state anomalous Hall effect

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