摘要
在晶体缺陷的热平衡原理的基础上,通过计算体系的结合能解释了钙钛矿锰氧化物La0.7Sr0.3-xAgxMnO3的晶胞体积随掺杂量x的增加而增大的实验现象,以及样品的居里温度疋随掺杂量x的增加而降低的现象。
Based on the thermal equilibrium theory of crystal defects, the phenomenon of unit cell volume of La0.7Sr0.3-xAgxMnO3 perovskite manganites increases with increasing the doping level x, has been explained through computating cohesive energy of the system, as well as the phenomenon that the Curie temperature Tc decreases with the doping x increase.
基金
国家自然科学基金项目(10774037)
河北省自然科学基金项目(E2006000168)
关键词
结合能
双交换机制
钙钛矿
空位
cohesive energy
double exchange mechanism
perovskite
vacancy