Giant Doping Response of Magnetic Anisotropy in MnTe
Abstract
Developing simple ways to control spin states in spintronic devices is a crucial step towards increasing their functionality. MnTe is a room-temperature antiferromagnet with promising spintronic properties, including for thermospintronics and magnon-based devices. Here, we show that, in MnTe, less than 1% Li is sufficient to produce a dramatic spin reorientation as observed by neutron diffraction. The behavior of the 0001 magnetic Bragg peak reveals a significant reorientation of the Mn spins from planar in the pure material to almost completely axial with minimal Li doping. Temperature dependence of the magnetic peaks in Li-doped samples indicates that axial spins shift back to planar suddenly upon approaching the Néel temperature (TN = 307 K). Density functional theory calculations support the idea that a shift in the Fermi level caused by doping is responsible for switching the material between two competing magnetic ground states. These results pave the way for developing easy switching of magnetic states in functional materials such as spintronic devices and topological insulators.
- Authors:
-
[1];
[1];
[1];
[1];
[1];
[1];
[1]
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- North Carolina State Univ., Raleigh, NC (United States)
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics
- 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); MOST (China); US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF)
- OSTI Identifier:
- 1841498
- Grant/Contract Number:
- AC05-00OR22725; No. 2018YFA0702100; FA9550-19-1-0363; NSF-ECCS-1711253
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Antiferromagnetism; Magnetic anistropy; Spintronics; Density functional theory; Neutron diffraction
Citation Formats
Moseley, Duncan, Taddei, Keith, Yan, Jiaqiang, McGuire, Michael A., Calder, Stuart, Polash, Md Mobarak Hossain, Vashaee, Daryoosh, Zhang, Xiaofan, Zhao, Huaizhou, Parker, David S., Fishman, Randy, and Hermann, Raphael P. Giant Doping Response of Magnetic Anisotropy in MnTe. United States: N. p., 2022.
Web. doi:10.1103/PhysRevMaterials.6.014404.
Moseley, Duncan, Taddei, Keith, Yan, Jiaqiang, McGuire, Michael A., Calder, Stuart, Polash, Md Mobarak Hossain, Vashaee, Daryoosh, Zhang, Xiaofan, Zhao, Huaizhou, Parker, David S., Fishman, Randy, & Hermann, Raphael P. Giant Doping Response of Magnetic Anisotropy in MnTe. United States. https://doi.org/10.1103/PhysRevMaterials.6.014404
Moseley, Duncan, Taddei, Keith, Yan, Jiaqiang, McGuire, Michael A., Calder, Stuart, Polash, Md Mobarak Hossain, Vashaee, Daryoosh, Zhang, Xiaofan, Zhao, Huaizhou, Parker, David S., Fishman, Randy, and Hermann, Raphael P. Tue .
"Giant Doping Response of Magnetic Anisotropy in MnTe". United States. https://doi.org/10.1103/PhysRevMaterials.6.014404. https://www.osti.gov/servlets/purl/1841498.
@article{osti_1841498,
title = {Giant Doping Response of Magnetic Anisotropy in MnTe},
author = {Moseley, Duncan and Taddei, Keith and Yan, Jiaqiang and McGuire, Michael A. and Calder, Stuart and Polash, Md Mobarak Hossain and Vashaee, Daryoosh and Zhang, Xiaofan and Zhao, Huaizhou and Parker, David S. and Fishman, Randy and Hermann, Raphael P.},
abstractNote = {Developing simple ways to control spin states in spintronic devices is a crucial step towards increasing their functionality. MnTe is a room-temperature antiferromagnet with promising spintronic properties, including for thermospintronics and magnon-based devices. Here, we show that, in MnTe, less than 1% Li is sufficient to produce a dramatic spin reorientation as observed by neutron diffraction. The behavior of the 0001 magnetic Bragg peak reveals a significant reorientation of the Mn spins from planar in the pure material to almost completely axial with minimal Li doping. Temperature dependence of the magnetic peaks in Li-doped samples indicates that axial spins shift back to planar suddenly upon approaching the Néel temperature (TN = 307 K). Density functional theory calculations support the idea that a shift in the Fermi level caused by doping is responsible for switching the material between two competing magnetic ground states. These results pave the way for developing easy switching of magnetic states in functional materials such as spintronic devices and topological insulators.},
doi = {10.1103/PhysRevMaterials.6.014404},
journal = {Physical Review Materials},
number = 1,
volume = 6,
place = {United States},
year = {Tue Jan 18 00:00:00 EST 2022},
month = {Tue Jan 18 00:00:00 EST 2022}
}
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