First Principle Calculation of the Magnetocrystalline Anisotropy Energy of FePt and CoPt Ordered Alloys
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概要
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The spin-polarized band calculations including spin-orbit interaction for L1_0-FePt and CoPt ordered alloys have been performed with LMTO-ASA method in the frame of local spin density functional approximation. It has been shown that strong uniaxial magnetic anisotropy of both alloys is brought about by a large spin-orbit coupling of Pt atom and a strong hybridization of Pt d bands with highly polarized Fe (Co) d bands. The obtained magnetocrystalline anisotropy energy (MAE) is about 16×10^6 J/m^3 for FePt and 9×10^6 J/m^3 for CoPt. It is also found that both MAE's have a trend of increase with increasing axial ratio c/a in the vicinity of measured c/a. This can be regarded as being associated with the behavior that the MAE's decrease with increasing band filling.
- 1994-08-15
著者
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Sakuma Akimasa
Magnetic And Electronic Materials Research Laboratory Hitachi Metals Ltd.
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Sakuma Akimasa
Magnetic & Electronic Materials Research Laboratory Hitachi Metal Ltd
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