Magnetic exchange interactions in the paramagnetic state of hcp Gd
2007 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 19, no 32Article in journal (Refereed) Published
We use the first-principles magnetic force theorem embodied in the Korringa-Kohn-Rostoker method to calculate pair magnetic exchange interactions in pure hexagonal close packed ( hcp) Gd metal in the ferromagnetic as well as in the paramagnetic state with disordered local 4f-moments. It is found that the exchange interactions between the localized 4f-moments, in particular also distant ones, depend on the state of magnetic disorder. Such a dependence is a consequence of the electronic structure changes of the conduction band that mediates the interaction between the local moments. The magnetic ordering temperature has been calculated using a Monte Carlo simulation technique and the results are compared with mean-field based studies.
Place, publisher, year, edition, pages
2007. Vol. 19, no 32
transition-metal-alloys, rare-earth, bulk, surfaces, moments, ni
IdentifiersURN: urn:nbn:se:kth:diva-16814DOI: 10.1088/0953-8984/19/32/326218ISI: 000248185800025ScopusID: 2-s2.0-34547314328OAI: oai:DiVA.org:kth-16814DiVA: diva2:334857
QC 201005252010-08-052010-08-05Bibliographically approved