Nonstoichiometry of BaEu2Mn2O7
Nonstoichiometry of BaEu2Mn2O7
复制标题
BaEu2Mn2O7 的非化学计量
DOI：
10.1016/0254-0584(90)90008-x
复制
发表时间：
1990
影响因子：
4.6
通讯作者：
M. Ichikawa
中科院分区：
文献类型：
--
作者：
N. Kamegashira;M. Ichikawa
Oxygen nonstoichiometry of BaEu2Mn2O7phase was measured by thermogravimetric analysis at 1273 K under various oxygen partial pressures. It is found that this phase has an oxygen excess nonstoichiometry formx= 0 to 0.33 in BaEu2Mn2O7+xand this result is supported by the electrical conductivity measurement, which shows p-type semiconducting behavior. The electrical conductivity also suggested the existence of a phase transition near 550 K from the z-type jump in the conductivity curve for the orthorhombic phase, while the tetragonal phase shows no anomaly near this temperature region. A T−x phase diagram for BaEu2Mn2O7+xis schematically proposed.
