Exchange interactions and Curie temperature of Y-Co compounds

The Curie temperature of rare-earth Co intermetallics is investigated by self-consistent spin-polarized electronic-structure calculations on Y-Co compounds. The total exchange interaction of a given site with all other sites (J/sub o/) is calculated by the linear-muffin-tin-orbital method using the...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	IEEE transactions on magnetics 2003-09, Vol.39 (5), p.2908-2910
Hauptverfasser:	Kashyap, A., Skomski, R., Sabiryanov, R.F., Jaswal, S.S., Sellmyer, D.J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropic magnetoresistance Applied sciences Cobalt Condensed matter: electronic structure, electrical, magnetic, and optical properties Elementary particle exchange interactions Exact sciences and technology Intermetallic Magnetic moments Magnetic properties and materials Magnetism Metals. Metallurgy Orbital calculations Permanent magnets Physics Scattering Studies of specific magnetic materials Temperature
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The Curie temperature of rare-earth Co intermetallics is investigated by self-consistent spin-polarized electronic-structure calculations on Y-Co compounds. The total exchange interaction of a given site with all other sites (J/sub o/) is calculated by the linear-muffin-tin-orbital method using the local force theorem and employed to obtain mean-field Curie-temperature estimates. The theoretical predictions for YCo/sub 3/, YCo/sub 5/, and Y/sub 2/Co/sub 17/ are in fair agreement with the experimental Curie temperatures. For YCo/sub 5/, the variation of exchange interactions (J/sub ij/) with distance is analyzed, and it is discussed how the presence of nonequivalent cobalt sites affects the Curie temperature of the compounds.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2003.815744