Thermal Diffusivity and Phase Transition of Rare Earth Manganites
Thermal diffusivity of nonstoichiometric PrMnO3 and NdMnO3 phases were measured by laser flash method from room temperature to 1100 K, in addition to the data of electrical conductivity, thermal analysis and high temperature X-ray diffractometry to detect the phase transition. The thermal diffusivity curve varied with increasing temperature and showed a clear anomaly with a sudden dip at the phase transition temperature. The transition temperature decreases with oxygen nonstoichiometry in each phase.
Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi
M. Kobayashi, H. Sato, Y. Hiyoshi, N. Kamegashira, D. J. Lee, H. J. Kim, "Thermal Diffusivity and Phase Transition of Rare Earth Manganites", Key Engineering Materials, Vols. 321-323, pp. 1695-1698, 2006