Abstract
The coercivity mechanism of nanocomposite Sm-Co/Fe multilayer films was investigated. It was concluded that the magnetization reversal mechanism of Sm-Co/Fe multilayer films is dominated mainly by domain wall pinning instead of nucleation. The addition of Cu layer between the hard and soft layers causes the change in grain boundary as well as the large variation in anisotropy in the hard layer after annealing, which leads to a strong increase in domain wall pinning, and therefore a significant improvement of the coercivity. This study indicates the potentials of this method to control and improve the magnetic property of nanocomposite multilayer films.
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