This article is cited in 6 papers

Lattice dynamics

Thermal expansion and lattice dynamics of RB$_{66}$ compounds at low temperatures

V. V. Novikov^a, D. V. Avdashchenko^b, N. V. Mitroshenkov^a, A. V. Matovnikov^a, S. L. Bud'ko<sup>c

a</sup> Bryansk Physical Laboratory, Petrovsky Bryansk State University, Bryansk, 241036, Russia
^b I. G. Petrovsky Bryansk State Pedagogical University
^c Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, USA

Abstract: Thermal characteristics of the phonon and magnon subsystems of icosahedral borides RB$_{66}$ (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 RB$_{66}$ compounds and the Grüneisen parameters have been calculated.

Received: 27.03.2014

 English version: Physics of the Solid State, 2014, 56:10, 2069–2076

Bibliographic databases:

•