Investigation of thermophysical characteristics of SrMoO4 crystals, nominally pure and doped with rare earth ions

• Published in: Crystallography reports 2015-11, Vol.60 (6), p.915-920
• Main Authors: Popov, P. A., Skrobov, S. A., Matovnikov, A. V., Ivleva, L. I., Dunaeva, E. E., Shekhovtsov, A. N., Kosmyna, M. B.
• Format: Article
• Language: English
• Subjects: Crystallography and Scattering Methods; Physical Properties of Crystals; Physics; Physics and Astronomy
• ISSN: 1063-7745; 1562-689X
• DOI: 10.1134/S1063774515060267

Thermophysical characteristics of SrMoO 4 crystals (grown by the Czochralski method from intrinsic melts), nominally pure and doped with rare earth ions, have been investigated. The temperature and concentration dependences of the thermal conductivity are obtained for SrMoO 4 samples containing Nd 3+ (0.28, 0.56, 0.84, and 1.33 at %), Pr 3+ (0.01 and 0.41 at %), Ho 3+ (0.01 and 0.06 at %), and Ho 3+ (0.13 at %) + Tm 3+ (0.13 at %) in a temperature range of 50–300 K. The thermal conductivities are measured in the directions parallel and/or perpendicular to the crystal optical axis. The thermal conductivity of nominally pure SrMoO 4 at 300 K in the direction perpendicular to the c axis has been found to be 4.2 W/(m K). The introduction of impurities of rare earth metals reduces the thermal conductivity of SrMoO 4 crystals. The anisotropy of the thermal conductivity is weak. The measured molar specific heat C P ( T ) of a nominally pure SrMoO 4 crystal is 116.2 J/(mol K) at 300 K. The temperature dependence of the phonon mean free path l ( T ) in a SrMoO 4 crystal is calculated for the temperature range of 80-300 K based on experimental data.