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Magnetic exchange interactions in the paramagnetic state of hcp Gd
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
2007 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 19, no 32Article in journal (Refereed) Published
Abstract [en]

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
Keyword [en]
transition-metal-alloys, rare-earth, bulk, surfaces, moments, ni
Identifiers
URN: urn:nbn:se:kth:diva-16814DOI: 10.1088/0953-8984/19/32/326218ISI: 000248185800025Scopus ID: 2-s2.0-34547314328OAI: oai:DiVA.org:kth-16814DiVA: diva2:334857
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Ruban, Andrei V.
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