Terahertz magneto-optical response in ferromagnetic Fe-Co-Al alloys.

Autor: Lei M; Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, United States of America., Coh S; Materials Science and Mechanical Engineering, University of California Riverside, Riverside, CA 92521, United States of America.
Jazyk: angličtina
Zdroj: Journal of physics. Condensed matter : an Institute of Physics journal [J Phys Condens Matter] 2024 May 09; Vol. 36 (31). Date of Electronic Publication: 2024 May 09.
DOI: 10.1088/1361-648X/ad4226
Abstrakt: We study the magneto-optical properties of Fe-Co-Al ordered alloys in the terahertz range of frequencies. Using the standard Kubo-based approach to compute intrinsic part of theσxy(ω)we find a strong dependence of σ xy on ω in the terahertz range. For example, we find that below 10 THz Co 3 Al has nearly constant σ xy and that above 10 THz it is reduced by about 50 times. Furthermore, we find a strong dependence of σ xy on the chemical composition. For example, we find that the addition of Al to Fe changes the sign of σ xy , while the addition of Co to Fe leads to a nonmonotonic dependence of σ xy on Co concentration.
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Databáze: MEDLINE
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