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Thermal expansion and lattice dynamics of RB66 compounds at low temperatures

TitleThermal expansion and lattice dynamics of RB66 compounds at low temperatures
Publication TypeJournal Article
Year of Publication2014
AuthorsNovikov, VV, Avdashchenko, DV, Mitroshenkov, NV, Matovnikov, AV, Bud'ko, SL
JournalPhysics of the Solid State
Volume56
Pagination2069-2076
Date Published10
Type of ArticleArticle
ISBN Number1063-7834
Accession NumberWOS:000343715600022
Keywordsalkali-halide crystals, alloys, magnetic-properties
Abstract

Thermal characteristics of the phonon and magnon subsystems of icosahedral borides RB66 (R = Gd, Tb, Dy, Ho, Eu, or Lu) have been studied based on the obtained experimental data on the thermal expansion of the borides and the earlier results on their heat capacity in the range of 2-300 K. The contribution to the expansion of borides containing paramagnetic R (3+) ions, which is characteristic of transition to the spin-glass state, has been revealed. The phonon spectrum moments of RB66 compounds and the Gruneisen parameters have been calculated.

DOI10.1134/s1063783414100230
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