Two-step phase changes in cubic relaxor ferroelectrics
Two-step phase changes in cubic relaxor ferroelectrics
复制标题
立方弛豫铁电体的两步相变
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Weissman
中科院分区：
文献类型：
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作者：
E. Colla;M. Weissman
场驱动的转换之间的零场冷却的冷冻弛豫状态和铁电状态的几个立方弛豫被发现发生在至少两个不同的步骤，经过一段时间的蠕变，作为时间的函数。这种状态的弛豫回弛豫状态下加热在零场也发生通过两个或更多个尖锐的步骤，相反，一个一步弛豫的铁电状态形成的场冷却。中间态可以通过中断极化来捕获。巨热释电噪声出现在某些非平衡区域。有人建议，两种耦合类型的顺序，一个铁电和其他玻璃，可能需要考虑这些数据。
The field-driven conversion between the zero-field-cooled frozen relaxor state and a ferroelectric state of several cubic relaxors is found to occur in at least two distinct steps, after a period of creep, as a function of time. The relaxation of this state back to a relaxor state under warming in zero field also occurs via two or more sharp steps, in contrast to a one-step relaxation of the ferroelectric state formed by field-cooling. An intermediate state can be trapped by interrupting the polarization. Giant pyroelectric noise appears in some of the non-equilibrium regimes. It is suggested that two coupled types of order, one ferroelectric and the other glassy, may be required to account for these data.