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- W2078281963 abstract "The dependence of exchange bias in polycrystalline Co/CoO nanoscale antidot arrays on temperature and Co layer thickness ${t}_{text{Co}}$ has been systematically probed using the anisotropic magnetoresistance technique. Our experimental results reveal a relatively small degree of asymmetry in the magnetization reversal process of the antidot arrays as compared to a continuous film of identical composition, attributable to the configurational anisotropy of the antidot arrays and the competition between interfacial ferromagnetic-antiferromagnetic (FM-AFM) exchange anisotropy and FM uniaxial anisotropy. The strong interplay between thermal activation effects and AFM domain size confinement in the antidot arrays results in the exchange bias field ${H}_{E}$ being either smaller or larger than the continuous film depending on the temperature. Furthermore, with increasing ${t}_{text{Co}}$, the asymmetry in the magnetization reversal of the antidot arrays increases monotonously due to enhancement in the FM anisotropy. This enhancement is accompanied by a reduction in the magnitudes of ${H}_{E}$ and coercive field ${H}_{C}$ with increasing ${t}_{text{Co}}$ at all temperatures." @default.
- W2078281963 created "2016-06-24" @default.
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- W2078281963 date "2009-02-18" @default.
- W2078281963 modified "2023-09-26" @default.
- W2078281963 title "Probing the exchange bias in Co/CoO nanoscale antidot arrays using anisotropic magnetoresistance" @default.
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- W2078281963 doi "https://doi.org/10.1103/physrevb.79.064413" @default.
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