Institute of Electrical Engineering, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, P. R. China;
Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China;
Institute of Electrical Engineering, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, P. R. China;
Institute of Electrical Engineering, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, P. R. China;
PMNT; nano-powders; relaxation; ferroelectrics;