期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 19, 期 32, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/19/32/326218
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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.
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