An alternative ground state of MnBi2Te4 obtained by magnetic annealing

Abhinna Rajbanshi; Jie Xing; Dongliang Gong; Williams A. Shelton; Rongying Jin

doi:10.1063/5.0284832

An alternative ground state of MnBi₂Te₄ obtained by magnetic annealing

Abhinna Rajbanshi
, Jie Xing
, Dongliang Gong
, Williams A. Shelton
, Rongying Jin

Research output: Contribution to journal › Article › peer-review

Abstract

Magnetic topological insulators are extremely interesting because they combine the unique properties of topological insulators with magnetism. While as-grown MnBi₂Te₄ single crystals exhibit an A-type antiferromagnetic (AFM) ordering at T_N ≈ 24 K, annealed MnBi₂Te₄ under 10 T leads to the change of the magnetic properties from AFM to superparamagnetic behavior with the trend of the magnetization saturation at 2 K. Correspondingly, the magnetotransport properties change as well, revealing large positive magnetoresistance with the linear field dependence at low temperatures. Through the first-principles calculations, we provide insight into the experimental results.

Original language	English
Article number	101110
Journal	APL Materials
Volume	13
Issue number	10
DOIs	https://doi.org/10.1063/5.0284832
State	Published - Oct 1 2025
Externally published	Yes

Funding

This study was supported by the Grant No. DE-SC0024501 funded by the U.S. Department of Energy, Office of Science.

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10.1063/5.0284832

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title = "An alternative ground state of MnBi2Te4 obtained by magnetic annealing",

abstract = "Magnetic topological insulators are extremely interesting because they combine the unique properties of topological insulators with magnetism. While as-grown MnBi2Te4 single crystals exhibit an A-type antiferromagnetic (AFM) ordering at TN ≈ 24 K, annealed MnBi2Te4 under 10 T leads to the change of the magnetic properties from AFM to superparamagnetic behavior with the trend of the magnetization saturation at 2 K. Correspondingly, the magnetotransport properties change as well, revealing large positive magnetoresistance with the linear field dependence at low temperatures. Through the first-principles calculations, we provide insight into the experimental results.",

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AU - Rajbanshi, Abhinna

AU - Xing, Jie

AU - Gong, Dongliang

AU - Shelton, Williams A.

AU - Jin, Rongying

PY - 2025/10/1

Y1 - 2025/10/1

N2 - Magnetic topological insulators are extremely interesting because they combine the unique properties of topological insulators with magnetism. While as-grown MnBi2Te4 single crystals exhibit an A-type antiferromagnetic (AFM) ordering at TN ≈ 24 K, annealed MnBi2Te4 under 10 T leads to the change of the magnetic properties from AFM to superparamagnetic behavior with the trend of the magnetization saturation at 2 K. Correspondingly, the magnetotransport properties change as well, revealing large positive magnetoresistance with the linear field dependence at low temperatures. Through the first-principles calculations, we provide insight into the experimental results.

AB - Magnetic topological insulators are extremely interesting because they combine the unique properties of topological insulators with magnetism. While as-grown MnBi2Te4 single crystals exhibit an A-type antiferromagnetic (AFM) ordering at TN ≈ 24 K, annealed MnBi2Te4 under 10 T leads to the change of the magnetic properties from AFM to superparamagnetic behavior with the trend of the magnetization saturation at 2 K. Correspondingly, the magnetotransport properties change as well, revealing large positive magnetoresistance with the linear field dependence at low temperatures. Through the first-principles calculations, we provide insight into the experimental results.

UR - https://www.scopus.com/pages/publications/105018298479

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DO - 10.1063/5.0284832

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VL - 13

JO - APL Materials

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IS - 10

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ER -

An alternative ground state of MnBi₂Te₄ obtained by magnetic annealing

Abstract

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