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Journal article

The Application of CPA to Calculations of the Mean Magnetic Moment in the Gd1-xNi, Gd1-xFe, Gd1xCox, and Y1-xCox Intermetallic Compounds

From

Risø National Laboratory, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

Risø National Laboratory for Sustainable Energy, Technical University of Denmark2

Calculations are made of the mean magnetic moment per atom of the transition metal and the rare-earth metal in the intermetallic compounds, Gd1-x,Nix, Gd1-x Fex, Gd1-x Cox, and Y1-x Cox. A simple model of the disordered alloy consisting of spins localized on the rare-earth atoms and interacting with a narrow d-band is considered.

The magnetic moment of the alloy at zero temperature is calculated within the molecular field and Hartree-Fock approximations. Disorder is treated in the coherent potential approximation. Results are in good agreement with the experimental data obtained for the crystalline and amorphous intermetallic compounds.

Es werden Rechnungen des mittleren magnetischen Moments pro Atom des Übergangsmetalls und des Metalls der Seltenen Erde in den intermetallischen Verbindungen Gd1-x Nix Gd1-x Fex, Gd1-x Cox,und Y1-x Cox durchgeführt. Dazu wird eineinfaches Modell der gestörten Legierung be-trachtet, das aus an den Seltenen-Erdatomen lokalisierten Spins besteht, die mit einem schmalen d-Band wechselwirken.

Das magnetische Moment der Legierung am Nullpunkt wird innerhalb der Molekularfeldnäherung und der Hartree-Fock-Näherung berechnet. Fehlordnung wird in der Näherung des kohärenten Potentials behandelt. Die Ergebnisse befinden sich in guter Übereinstim-mung mit den experimentellen Werten für kristalline und amorphe intermetallische Verbindungen.

Language: English
Year: 1977
Pages: 205-211
ISSN: 15213951 and 03701972
Types: Journal article
DOI: 10.1002/pssb.2220820121

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