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In order to increase the uniaxial magnetocrystalline anisotropy constant ( K u ) of a Co 50 Pt 50 film, Co M ( M = Pt, Pd, Rh) disordered films are investigated with respect to stacking faults (SFs) in hexagonal-close-packed (hcp) grains. The Co 50 Rh 50 film was revealed to have nearly perfect hcp stacking, while the Co 50 Pt 50 and Co 50 Pd 50 films contain SFs. Therefore, Pt atoms in the Co 50 Pt 50 films were replaced by Rh atoms to enhance K u by decreasing the density of SFs. The Co 50 (Pt 1− r Rh r ) 50 film with r = 0.5 showed a maximum K u of nearly 1 × 10 7 erg cm −3 , which is around 10 times larger than that for the Co 50 Pt 50 film.
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Nozawa et al. (2013) studied this question.
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