Unusual Field Dependence of the Anomalous Hall Effect in Ta/Tb-Fe-Co
Name
PhysRevApplied.13.034053.pdf
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Checksum (MD5)
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Author(s)
Davydova, M.D.
Skirdkov, P.N.
Zvezdin, K.A.
Wu, Jong-Ching
Ciou, Sheng-Zhe
Chiou, Yi-Ru
Ye, Lin-Xiu
Wu, Te-Ho
Bhatt, Ramesh Chandra
Kimel, A.V.
Date Issued
March 2020
Journal
Physical Review Applied
Publisher
American Physical Society (APS)
Citation
Davydova, M.D. et al. "Unusual Field Dependence of the Anomalous Hall Effect in Ta/Tb-Fe-Co." Physical Review Applied, 13, 3 (March 2020): 034053. © 2020 American Physical Society
Version
Final published version
Abstract
Experimental studies of the anomalous Hall effect are performed for thin-film Ta/Tb-Fe-Co over a wide range of temperatures and magnetic fields up to 3 T. Far from the compensation temperature ($T_{M}$ = 277 K), the field dependence has a conventional shape of a single hysteresis loop; just below the compensation point, the dependence is anomalous with the shape of a triple hysteresis. To understand this behavior, we experimentally reveal the magnetic phase diagram and theoretically analyze it in terms of spin-flop-like phase transitions. In this case, we observe the dominance of the Fe-Co sublattice, which is a subject of the strong interaction with the Ta layer. This Fe-Co anisotropy enhancement is expressed in the appearance of abnormal wing-shaped hysteresis loops near the compensation point and, in the unusual phase diagram, where the first-order phase transition line deviates towards low temperatures. This effect can be useful for the design of ultrafast ferrimagnetic devices with desired switching parameters.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevApplied.13.034053
