Double hysteresis loops induced by Mn doping in Pb0.99Nb0.02(Zr0.95Ti0.05)(0.98)O-3 ferroelectric ceramics

作者：Jiang Meng; Li Xuhai; Zhu Jiliang^*; Zhu Xiaohong; Shi Wei; Li Lihua; Xiao Dingquan; Zhu Jianguo

来源：Current Applied Physics, 2010, 10(2): 526-530.

DOI：10.1016/j.cap.2009.07.012

• PNZT95/5
• Antiferroelectric
• Double hysteresis loops
• Defect dipoles

Pb0.99Nb0.02(Zr0.95Ti0.05)(0.98)O-3 (PNZT95/5) ceramics with 1 mol% and without Mn doping were prepared via conventional solid state reaction process. X-ray diffraction patterns show that the PNZT95/5 and Mn-doped PNZT95/5 (PNZTM95/5) ceramics, with composition near the boundary of the ferroelectric phase (FE)/antiferroelectric phase (AFE), have a rhombohedral perovskite structure. The ferroelectric behavior of PNZT95/5 ceramics is strongly affected by Mn doping. Without any aging process the PNZTM95/5 ceramics possess double hysteresis loops (P-E loops), whereas the PNZT95/5 ceramics possess normal single hysteresis loops. Due to the defect dipoles formed by effectively negatively charged Mn3+ dopants and positively charged O2- vacancies, the PNZTM95/5 ceramics exhibit the double P-E loops. The defect dipole effect has been proved by investigating the P-E loops under different external fields. As a result, the PNZTM95/5 ceramics become "hardened", exhibiting a high mechanical quality factor (1300).

• 出版日期2010-3
• 单位中国地震局; 四川大学