中国物理B ›› 1997, Vol. 6 ›› Issue (12): 913-920.doi: 10.1088/1004-423X/6/12/005
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
岳振星, 王晓莉, 张良莹, 姚熹
YUE ZHEN-XING (岳振星), WANG XIAO-LI (王晓莉), ZHANG LIANG-YING (张良莹), YAO XI (姚熹)
摘要: The dielectric properties of ceramics in Pb(Zn1/3Nb2/3)O3-BaTiO3-PbTiO3 system were characterized using dielectric-temperature spectra. A spontaneous (zero field) relaxor-normal ferroelectric tran sition was observed for tetragonal rich compositions. A significant hysteresis effect accompanied by this transition, similar to first-order phase transition of normal ferroelectrics. This behavior was different from that of other relaxors, in which such transitions occurred only under a biased dc field. This observation was explained in terms of a thermally driven transformation from an ensemble of polar microregions to normal long-range ferroelectric state (micro-macro domain transition), which was attributed to the internal field resulting from the tetragonal strain.
中图分类号: (Dielectric loss and relaxation)