Title: Magnetization reversal of bit patterned media: Role of the angular orientation of the magnetic anisotropy axes
Abstract: Micromagnetic modeling was performed to study the influence of an angular dispersion of the magnetic anisotropy axis on the reversal behavior of tilted bit patterned media with an areal density of about 1 Tbit/in.2. Thereby, the angular dispersion was realized by having the anisotropy axes of the individual bits lying on the surface of a cone with a specific opening angle. In addition, a distribution of the magnetic anisotropy value within the array of magnetic nanostructures was taken into account. The effect of the angular variation in the magnetic anisotropy orientation on the switching field distribution was investigated. Two optimized geometries were suggested in order to keep the switching field distribution as narrow as possible: (1) uniaxial perpendicular bits with the magnetic field applied under an angle of 45° and (2) tilting the anisotropy axis to about 45°–75° and applying a perpendicular magnetic field. However, mixing both situations results in a drastic increase in the switching field distribution.
Publication Year: 2010
Publication Date: 2010-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 6
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