Abstract
We investigate apparently zigzag domain walls in ultrathin magnetic films and calculate the total energy in zero applied field considering anisotropies in the second-order approximation. We discuss the change in zigzag wall morphology and scale as a function of the dipolar length and the total energy depend on film parameters exclusively anisotropy constants, crystallographic orientation and film thickness for a given dipolar length. We explain also the role of the second-order anisotropy in the total energy and the dynamics response of the in-plane magnetization for a given dipolar length. We use some constants in connection with experimental data reported for amorphous TbCo films grown in external in-plane magnetic field by high-frequency ion sputtering and for MnAs on GaAs films.
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