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Micromagnetic Simulation of a Magnetic Film With Surface Roughness

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5 Author(s)
Lin Yuan ; Dept. of Electron. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan ; Jian-Jun Jiang ; Zhongyou Wang ; Bin Tian
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We have simulated micromagnetically the static magnetic structure and magnetic spectrum of a magnetic film with surface roughness, using a finite stripe film model. We found that the rough surface can lead to a ripple magnetic structure, which results in increasing the damping factor of the film, and that the damping factor increases with the increase of the root-mean-square roughness. For a particular film with a given rough surface, the damping factor first decreases because of a decrease of the magnetic dispersion, then increases because of the surface-roughness-induced demagnetizing effect with increasing the external field.

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Magnetics, IEEE Transactions on  (Volume:44 ,  Issue: 9 )