Thermal physical properties of the La0.825Sr0.175MnO3 single crystals

Abstract

The heat capacity (C P), the thermal diffusion (η), the thermal conductivity (κ), and the electrical resistance of the La0.825Sr0.175MnO3 single crystal have been measured in the temperature range 80–350 K in magnetic fields to 40 kOe. Dependences C P(T), κ(T), and η(T) have anomalies near T C, which are suppressed in magnetic field. The minima in dependences κ(T) and η(T) near T C are explained by the phonon scattering on fluctuations of the magnetic order parameter. Dependences κ(T) and η(T) have anomalies near T S = 200 K related to the structural transition from the rhombohedral (R) to the orthorhombic (O*) phase.