Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2018-12-28
Department
Isfahan University of Technology
Department of Applied Physics
Nanomagnetism and Spintronics
Department of Applied Physics
Nanomagnetism and Spintronics
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Language
en
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1-8
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Physical Review B, Volume 98, issue 21
Abstract
Magnetization reversal is investigated in the presence of anisotropy dispersion in weakly disordered CoxPd100-x(x=23,36,43) thin films. A fourfold in-plane magnetic anisotropy is observed for x=23, whereas an increase of the Co:Pd ratio induces a uniaxial anisotropy in x=36 and 43 films. Anomalous magnetization reversal appears along the hard axes (referred to as collapse of hard axes) in x=23 and 36 films, but disappears for x=43. The results are consistent with the two-grain Stoner-Wohlfarth model. It is argued that the collapse of the hard axes can be controlled by intergranular exchange interaction. Quadratic magneto-optical Kerr effect (QMOKE) is also observed in the films and is found to weaken if the in-plane anisotropy is lowered through the Co:Pd ratio. QMOKE is observed for magnetic field orientations near the hard axes but not exactly along it, in agreement with the two-grain Stoner-Wohlfarth model.Description
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Sedrpooshan , M , Ahmadvand , H , Van Dijken , S & González , D L 2018 , ' Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films ' , Physical Review B , vol. 98 , no. 21 , 214444 , pp. 1-8 . https://doi.org/10.1103/PhysRevB.98.214444