Disorder and noncollinear magnetism in permanent-magnet materials with the ThMn{sub 12} structure
- Institut fuer Theoretische Physik, Technische Universitaet Wien, Wiedner Hauptstrasse 8-10, A-1040 Wein (Austria)
We report calculations of the noncollinear magnetic structures of YFe{sub 12{minus}{ital x}}Mo{sub {ital x}} permanent-magnet materials, using a novel variant of a spin-polarized tight-binding--linear-muffin-tin-orbital technique allowing for local spin-quantization axes on each site and considering spin-orbit coupling. The ternary YFe{sub 12{minus}{ital x}}Mo{sub {ital x}} compounds crystallize in the tetragonal ThMn{sub 12} structure which can be stabilized only by the partial substitution of Fe by an early transition metal like Mo. We show that the substitutional disorder leads to canted spin structures at low Mo content ({ital x}{similar_to}1) and to spin-glass-like behavior at higher Mo content ({ital x}{similar_to}3).
- DOE Contract Number:
- FG02-86ER45262
- OSTI ID:
- 55257
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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