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Unusual Field Dependence of the Anomalous Hall Effect in Ta/Tb-Fe-Co

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.; Zvezdin, A.K.; ... Show more Show less
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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.
Date issued
2020-03
URI
https://hdl.handle.net/1721.1/125813
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
ISSN
2331-7019

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