Orbital magnetic moments and magnetic anisotropy energy in Rhn and ConPdM clusters
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The orbital magnetic moments 〈L〉 and the magnetic anisotropy energy (MAE) of RhN (N ≤ 55) and Co19PdM (M = 24 and 60) are determined by using a self-consistent real-space tight-binding method. For RhN, 〈L〉 amounts typically 20-50%25 of the total magnetic moment Mz = 2〈Sz〉 %2b 〈L z〉. Strong oscillations as a function of N are observed with a rapid convergence to zero as the spin magnetization vanishes for N ≃ 40-50. In Co19PdM clusters, the magnetization per Co atom is remarkably larger than in pure Co19. This is mainly due to the local spin moments 〈Siz〉 induced at the Pd atoms, which amount to about 20%25 of the spin moment per Co atom [2〈Siz〉 Pd = (0.1-0.3)μB]. Large orbital moments are found at the Co atoms, particularly at the Co/Pd interface. The anisotropy of 〈L〉 and the associated MAE%27s are analyzed from a local perspective.
The orbital magnetic moments 〈L〉 and the magnetic anisotropy energy (MAE) of RhN (N ≤ 55) and Co19PdM (M = 24 and 60) are determined by using a self-consistent real-space tight-binding method. For RhN, 〈L〉 amounts typically 20-50%25 of the total magnetic moment Mz = 2〈Sz〉 %2b 〈L z〉. Strong oscillations as a function of N are observed with a rapid convergence to zero as the spin magnetization vanishes for N ≃ 40-50. In Co19PdM clusters, the magnetization per Co atom is remarkably larger than in pure Co19. This is mainly due to the local spin moments 〈Siz〉 induced at the Pd atoms, which amount to about 20%25 of the spin moment per Co atom [2〈Siz〉 Pd = (0.1-0.3)μB]. Large orbital moments are found at the Co atoms, particularly at the Co/Pd interface. The anisotropy of 〈L〉 and the associated MAE's are analyzed from a local perspective.
