Dielectric relaxation modes in bismuth-doped SrTiO3:: The relaxor behavior
Dielectric relaxation modes in bismuth-doped SrTiO3:: The relaxor behavior
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DOI：
10.1103/physrevb.59.6670
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发表时间：
1999-03-01
影响因子：
3.7
通讯作者：
Loidl, A
中科院分区：
文献类型：
--
作者：
Ang, C;Yu, Z;Loidl, A
研究了铋掺杂SrTiO3在1.5 ~ 300 K和400 MHz温度范围内的铁电弛豫行为。得到了一些有趣的结果：(1)典型的铁电弛豫行为是由其他杂质弛豫模式衍生出来的。铁电弛豫峰出现在量子准电背景上。磁场冷却和零场冷却后的极化不可逆性以及剩余极化P-r数据表明，铁电弛豫体的行为是一种非平衡现象。(2)铁电弛豫峰与其他杂质模式的共存表明，在不同温度范围内存在多种极性团簇，导致不同的介电异常。这证实了铁电弛豫器的多簇态特性。(3)在400 MHz附近，出现了额外的松弛过程。这表明铁电弛豫器中可能存在两种极化过程。[s0163 - 1829(99) 03606 - 1]。
The ferroelectric relaxer behavior in Bi-doped SrTiO3 was studied in the temperature range 1.5-300 K and up to 400 MHz. Some interesting results are shown: (1) Typical ferroelectric relaxer behavior develops out of the other impurity relaxation modes. The ferroelectric relaxer peaks occur on the quantum-paraelectric background. The polarization irreversibility effect observed after field cooling or zero-field cooling, and the data of remanent polarization P-r, show that the ferroelectric relaxer behavior is a nonequilibrium phenomenon. (2) The coexistence of the ferroelectric relaxer peak with other impurity modes indicates that there are several kinds of polar clusters which are responsible for different dielectric anomalies in different temperature ranges. This confirms a multicluster state characteristic in ferroelectric relaxors. (3) Near 400 MHz, an additional relaxation process appears. which indicates the possible existence of two polarization processes in a ferroelectric relaxer. [S0163-1829(99)03606-1].