The ratio Mg:Nb=1:1 made the long-range correlation rise to a degree that tetragonal properties and strong polar vibration appeared.

• Mg与Nb为1:1的比例(与极性微区的Mg、Nb比例相同)使PMN-PT的长程相关性增加，极性键振动增强，居里温度附近出现四方相的特征。