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Title: Crystal growth and magnetic structure of MnBi 2 Te 4

Abstract

Millimeter-sized MnBi 2 Te 4 single crystals are grown out of a Bi-Te flux and characterized using magnetic, transport, scanning tunneling microscopy, and spectroscopy measurements. The magnetic structure of MnBi 2 Te 4 below T N is determined by powder and single-crystal neutron diffraction measurements. Below T N = 24 K, Mn 2+ moments order ferromagnetically in the ab plane but antiferromagnetically along the crystallographic c axis. The ordered moment is 4.04(13)μ B/Mn at 10 K and aligned along the crystallographic c axis in an A-type antiferromagnetic order. Below T N, the electrical resistivity drops upon cooling or when going across the metamagnetic transition in increasing magnetic fields. A critical scattering effect is observed in the vicinity of T N in the temperature dependence of thermal conductivity, indicating strong spin-lattice coupling in this compound. Yet, no anomaly is observed in the temperature dependence of thermopower around T N. Fine tuning of the magnetism and/or electronic band structure is needed for the proposed topological properties of this compound. The growth protocol reported here might be applied to grow high-quality crystals where the electronic band structure and magnetism can be finely tuned by chemical substitutions.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [4];  [5];  [3];  [6]; ORCiD logo [1];  [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Missouri, Columbia, MO (United States)
  3. Rutgers Univ., Piscataway, NJ (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Lab., Guangdong (China)
  6. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1524865
Alternate Identifier(s):
OSTI ID: 1546219
Grant/Contract Number:  
[AC05-00OR22725; AC02-07CH11358]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
[ Journal Volume: 3; Journal Issue: 6]; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Yan, Jiaqiang, Zhang, Qiang, Heitmann, Thomas, Huang, Zengle, Chen, K. Y., Cheng, J. -G., Wu, Weida, Vaknin, David, Sales, Brian C., and McQueeney, Robert John. Crystal growth and magnetic structure of MnBi2Te4. United States: N. p., 2019. Web. doi:10.1103/PhysRevMaterials.3.064202.
Yan, Jiaqiang, Zhang, Qiang, Heitmann, Thomas, Huang, Zengle, Chen, K. Y., Cheng, J. -G., Wu, Weida, Vaknin, David, Sales, Brian C., & McQueeney, Robert John. Crystal growth and magnetic structure of MnBi2Te4. United States. doi:10.1103/PhysRevMaterials.3.064202.
Yan, Jiaqiang, Zhang, Qiang, Heitmann, Thomas, Huang, Zengle, Chen, K. Y., Cheng, J. -G., Wu, Weida, Vaknin, David, Sales, Brian C., and McQueeney, Robert John. Fri . "Crystal growth and magnetic structure of MnBi2Te4". United States. doi:10.1103/PhysRevMaterials.3.064202.
@article{osti_1524865,
title = {Crystal growth and magnetic structure of MnBi2Te4},
author = {Yan, Jiaqiang and Zhang, Qiang and Heitmann, Thomas and Huang, Zengle and Chen, K. Y. and Cheng, J. -G. and Wu, Weida and Vaknin, David and Sales, Brian C. and McQueeney, Robert John},
abstractNote = {Millimeter-sized MnBi2Te4 single crystals are grown out of a Bi-Te flux and characterized using magnetic, transport, scanning tunneling microscopy, and spectroscopy measurements. The magnetic structure of MnBi2Te4 below TN is determined by powder and single-crystal neutron diffraction measurements. Below TN = 24 K, Mn2+ moments order ferromagnetically in the ab plane but antiferromagnetically along the crystallographic c axis. The ordered moment is 4.04(13)μB/Mn at 10 K and aligned along the crystallographic c axis in an A-type antiferromagnetic order. Below TN, the electrical resistivity drops upon cooling or when going across the metamagnetic transition in increasing magnetic fields. A critical scattering effect is observed in the vicinity of TN in the temperature dependence of thermal conductivity, indicating strong spin-lattice coupling in this compound. Yet, no anomaly is observed in the temperature dependence of thermopower around TN. Fine tuning of the magnetism and/or electronic band structure is needed for the proposed topological properties of this compound. The growth protocol reported here might be applied to grow high-quality crystals where the electronic band structure and magnetism can be finely tuned by chemical substitutions.},
doi = {10.1103/PhysRevMaterials.3.064202},
journal = {Physical Review Materials},
number = [6],
volume = [3],
place = {United States},
year = {2019},
month = {6}
}

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