Abstract
The magnetization reversal process in a magnetic film is discussed with a focus on the effects of surface anisotropy. Assuming an adiabatic rotation of magnetization, the entire configuration is determined by applying the variational technique to the total energy of the system including the surface and bulk anisotropy energy, the exchange energy, and also Zeeman energy. The magnetization reversal can proceed through both coherent and/or incoherent rotations depending on the values of magnetization, anisotropy, exchange stiffness, and film thickness. In the case of incoherent rotation, the magnetization configuration exhibits the normal twisted wall structure. The expression for the bifurcating condition is given explicitly.
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