Spin-orbit torques in Co2MnGa magnetic Weyl semimetal thin films
Paper in proceeding, 2023
Due to the nontrivial topology in their electronic band structure, topological quantum materials are known to exhibit unconventional surface states and anomalous transport properties. In the present study, the ferromagnetic Heusler alloy Co2MnGa, which breaks time-reversal symmetry, is studied to estimate its spin-orbit torque efficiency. Epitaxial thin films with high structural ordering are obtained, which show very high values of anomalous Hall conductivity. A spin-orbit torque efficiency of 0.13±0.01 is obtained in a 20 nm Co2MnGa film. The present results open the possibility to use these exotic materials in spintronic devices and beyond.
magnetic Weyl semimetal
Heusler alloy
Bery curvature
spin-orbit torque
Author
Lakhan Bainsla
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
University of Gothenburg
Yuya Sakuraba
National Institute for Materials Science (NIMS)
Ahmad Awad
University of Gothenburg
Akash Kumar
University of Gothenburg
Nilamani Behera
University of Gothenburg
Roman Khymyn
University of Gothenburg
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Johan Åkerman
University of Gothenburg
2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023 - Proceedings
9798350338362 (ISBN)
2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023
Sendai, Japan,
Sendai, Japan,
Subject Categories
Condensed Matter Physics
DOI
10.1109/INTERMAGShortPapers58606.2023.10228500