Low Temperature Heat Capacity of polycrystalline MnSi

Lost heat capacity and entropy in the helical magnet MnSi.

The heat capacity of MnSi at B = 0 and B = 4 T was measured in the temperature range 2.5-100 K. To analyze the data, calculations of the phonon spectrum and phonon density of states in MnSi were performed. The calculated phonon frequencies were confirmed by means of inelastic neutron scattering. The analysis of the data suggests the existence of negative contributions to the heat capacity and e...

Low-temperature Normal-state Heat Capacity of Tungsten

Low Temperature Heat Capacity and Thermodynamic Properties of Zinc Ferrite*

The heat capacity of zinc ferrite (ZnFe,O,) has been determined over the range 5 to 350°K. Molal values of C~,S’, and HO-H,O computed from the thermal data are 32,99&t-0.03 cal/deg., 36.01 f0.03 cal/deg., and 18,00&0.02 Cal, respectively, at 298,lS”K. A co-operative thermal anomaly associated with antiferromagnetic ordering occurs at 9.5” and extends toward higher temperatures probably as a con...

Low-temperature excess heat capacity in fresnoite glass and crystal

The effect of thermal annealing on low-temperature excess heat capacity was investigated in fresnoite (Ba2TiSi2O8) glass. The amplitudes of the excess heat capacity decreased, and their positions shifted to a higher temperature by relaxation or crystallization. In particular, we revealed that the change in the excess heat capacity during transition from the glassy state to the crystalline state...

SCHOTTKY-LIKE ANOMALY IN THE LOW-TEMPERATURE SPECIFIC HEAT OF POLYCRYSTALLINE Y0.3Gd0.2Sr0.5MnO3

In this paper we have synthesis of a sample of Y0.3Gd0.2Sr0.5MnO3 by solid state ceramic route method. The structural and thermodynamic properties of polycrystalline samples of Y0.3Gd0.2Sr0.5MnO3 were measured in order to investigate the effect of higher magnetic moment ion Gd and divalent Sr over Y ion. The structural transition from hexagonal to orthorhombic is observed at very high doping of...