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Ab initio theoretical description of the interrelation between magnetocrystalline anisotropy and atomic short-range order

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UNSPECIFIED (1999) Ab initio theoretical description of the interrelation between magnetocrystalline anisotropy and atomic short-range order. PHYSICAL REVIEW LETTERS, 82 (26). pp. 5369-5372. ISSN 0031-9007.

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Abstract

The cubic lattice symmetry of ferromagnetic homogeneously disordered alloys is broken when a compositional modulation is imposed. This can have a profound influence on the magnetocrystalline anisotropy energy (MAE). We describe our ab initio theory of this effect and use the framework of concentration waves with the electronic structure described within the spin-polarized relativistic Korringa-Kohn-Rostoker coherent-potential approximation. We find that ordering produces a 2 order of magnitude increase in the MAE as well as altering the equilibrium direction of magnetization. Using the same theoretical framework we also examine directional compositional order produced by magnetic annealing with an explicit study of permalloy.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW LETTERS
Publisher: AMERICAN PHYSICAL SOC
ISSN: 0031-9007
Official Date: 28 June 1999
Dates:
DateEvent
28 June 1999UNSPECIFIED
Volume: 82
Number: 26
Number of Pages: 4
Page Range: pp. 5369-5372
Publication Status: Published

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