Ab initio search for a high permeability material based on bcc iron
UNSPECIFIED. (2004) Ab initio search for a high permeability material based on bcc iron. PHYSICAL REVIEW B, 69 (6). -. ISSN 1098-0121Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevB.69.064425
Using the fully relativistic spin-polarized Korringa-Kohn-Rostoker method, we study the prototypical soft magnet, bcc iron. We investigate how its magnetic anisotropy (MAE) varies as a function of volume, band filling, and tetragonal distortions of the crystal lattice. We follow the trends of the linear magnetostriction and magnetic permeability. We find that a slight reduction in band filling and modest lattice expansion produces a significant magnetic softening of this model system. We explore whether this situation can be realized by doping bcc Fe with vanadium. Treating the compositional disorder with the coherent potential approximation, we calculate the magnetic anisotropy and magnetostriction trends of iron-rich Fe1-cVc disordered alloys and find the behavior to accord with the predictions from the bcc Fe model. In particular we find that for capproximate to0.1 the MAE is very small and the linear magnetostriction is zero. We propose Fe0.9V0.1 as a high permeability material. Fair agreement with experimental values for the MAE and magnetostriction of both Fe and FeV is found.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||PHYSICAL REVIEW B|
|Publisher:||AMERICAN PHYSICAL SOC|
|Number of Pages:||7|
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