Further study on the phase transition of BaTb2Mn2O7
Further study on the phase transition of BaTb2Mn2O7
复制标题
BaTb2Mn2O7相变的进一步研究
DOI：
10.1016/0254-0584(89)90047-3
复制
发表时间：
1989
影响因子：
4.6
通讯作者：
M. Horikawa
中科院分区：
文献类型：
--
作者：
N. Kamegashira;S. Umeno;H. Satoh;M. Horikawa
The electrical conductivity of the orthorhombic BaTb2Mn2O7phase has been measured as a function of temperature from room temperature to 1273K. The electrical conductivity exhibits an irregular behavior at 755K. The Differential Scanning Calorimeter (DSC) measurement also shows a thermal anomaly at 745K in the heating step, although thermal hysteresis was found. These results from both experiments indicate the occurrence of a phase transition near these temperatures. The transition temperatures determined in this work are a little higher than that from high temperature X-ray diffractometry. The enthalpy change for the phase transition is 3.0 KJ mol−1, a little higher than the values of BaEu2Mn2O7and BaSm2Mn2O7.
