Crystal structure and low-energy Einstein mode in ErVAl intermetallic cage compound
arXiv:1609.07161 · doi:10.1016/j.jssc.2016.09.029
Abstract
Single crystals of a new ternary aluminide ErVAl were grown using a self-flux method. The crystal structure was determined by powder X-ray diffraction measurements and Rietveld refinement, and physical properties were studied by means of electrical resistivity, magnetic susceptibility and specific heat measurements. These measurements reveal that ErVAl is a Curie-Weiss paramagnet down to 1.95 K with an effective magnetic moment = 9.27(1) and Curie-Weiss temperature = -0.55(4) K. The heat capacity measurements show a broad anomaly at low temperatures that is attributed to the presence of a low-energy Einstein mode with characteristic temperature = 44 K, approximately twice as high as in the isostructural 'Einstein solid' VAl.
arXiv comment15 pages, 9 figures + Supplementary Material; Accepted for publication in Journal of Solid State Chemistry
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