Abstract
We measured longitudinal and transverse magnetooptic Kerr effect loops to understand the angular dependence of magnetization reversal in an array of 5 /spl mu/m /spl times/ 25 /spl mu/m rectangular thin Co bars with uniaxial anisotropy. When the magnetic field is applied close to the hard axis, the reversal is dominated by coherent rotation; when the field is applied close to the easy axis, the reversal is caused by domain-wall unpinning and the coercive fields observe the relation H/sub c/ = H/sub 0//cos /spl theta//sub 0/. For the other orientations, the magnetization first rotates smoothly at larger fields and then switches irreversibly by domain-wall unpinning.
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