Angle dependent field-driven reorientation transitions in uniaxial antiferromagnet MnBi${}_2$Te${}_4$ single crystal

Abstract

MnBi${}_2$Te${}_4$, a two-dimensional magnetic topological insulator with a uniaxial antiferromagnetic structure, is an ideal platform to realize quantum anomalous Hall effect. However, the strength of magnetic interactions is not clear yet. We performed systematic studies on the magnetization and angle dependent magnetotransport of MnBi${}_2$Te${}_4$ single crystal. The results show that the direction of the magnetic field has significant effects on the critical field values and magnetic structure of this compound, which leads to different magnetotransport behaviors. The field-driven reorientation transitions can be utilized to estimate the AFM interlayer exchange interaction coupling and uniaxial magnetic anisotropy D. The obtained Hamiltonian can well explain the experimental data by Monte Carlo simulations. Our comprehensive studies on the field-driven magnetic transitions phenomenon in MnBi${}_2$Te${}_4$ provide a general approach for other topological systems with antiferromagnetism.

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References in corpus (4)

• High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
• Crystal growth and magnetic structure of MnBi2Te4
• Magnetic and transport properties in magnetic topological insulators MnBi2Te4(Bi2Te3)n (n=1,2)
• Metamagnetism of few layer topological antiferromagnets

Cited by in corpus (2)

• Quantum metric-induced nonlinear transport in a topological antiferromagnet
• Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)