Magnetic phase transition and lattice dynamic features in ErBC borocarbide.

A sample of erbium borocarbide ErBC was synthesized from a stoichiometric mixture of erbium, boron, and pyrographite hydride. Temperature dependent magnetic susceptibility, heat capacity and lattice parameters of borocarbide at 2-300 K were experimentally investigated, the Raman spectrum was determined and analyzed. Sharp anomalies in the heat capacity and magnetic properties of ErBC near= 16.

The specific features of phononic and magnetic subsystems of type-VII clathrate EuNiP.

A type-VII clathrate with a Eu2+ guest embedded into a Ni-P covalent framework, EuNi2P4, was synthesized by a standard two-stage ampoule synthesis and confirmed to crystallize in the orthorhombic space group Fddd with unit cell parameters a = 5.1829(1) Å, b = 9.4765(1) Å, and c = 18.

Crystal lattice disorder and characteristic features of the low-temperature thermal properties of higher borides.

Heat capacity C(T) and lattice parameters a(T), b(T) and c(T) of LuBSi borosilicide are experimentally studied as a function of temperature in the range of 2-300 K. The results are compared with those of pseudo-isostructural LuB boride. At the lowest temperatures, it is shown that the C(T) dependence of borosilicide changes linearly with temperature.

Thermodynamic properties and lattice dynamics investigation of LuBC: experiment and ab initio calculations.

A sample of lutetium carboboride LuB2C was synthesized from a mixture of lutetium hydride, boron and carbon by annealing in argon. The temperature dependence of the heat capacity Cp(T) (2-300 K) and lattice parameters a(T), b(T), and c(T) (5-300 K) of the carboboride was experimentally determined. The experimental values of the heat capacity were fitted with the approximation Cp(T) = aT + ΣCD + CE + CTLS(T).

Effect of the cation sublattice composition of tin-based type-I clathrates on their low-temperature thermal properties.

We performed an experimental study on thermal properties of the Sn18In6As21.5I8 clathrate by measuring temperature dependencies of its heat capacity (2-300 K) and thermal expansion (5-300 K). By comparing the results with those published previously for Sn-based clathrates Sn24P19.