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arXiv 1104.2440cond-mat.mtrl-sci
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BiFeO3陶瓷的大电场诱导应变

Large electric-field induced strain in BiFeO3 ceramics

Tadej Rojac, Marija Kosec, Dragan Damjanovic

摘要:

在低频(0.1 Hz)和大振幅(140 kV/cm)的驱动场下,测得BiFeO 3陶瓷的双极应变高达0.36%(峰峰值)。该应变与高效的Pb基钙钛矿陶瓷如Pb(Zr,Ti)O3和Pb(Mg,Nb)O3-PbTiO 3中可实现的应变相当。应变表现出对场频率的强烈依赖性,并且很可能在很大程度上与主要涉及非180°畴壁的畴切换相关。此外,通过施加低频的电场使带电缺陷重新排列,从而使这些畴壁脱钉,导致更有效的切换,并因此增加响应。

英文摘要:

Large bipolar strain of up to 0.36% (peak-to-peak value) was measured in BiFeO3 ceramics at low frequency (0.1 Hz) and large amplitude (140 kV/cm) of the driving field. This strain is comparable to that achievable in highly efficient Pb-based perovskite ceramics, such as Pb(Zr,Ti)O3 and Pb(Mg,Nb)O3-PbTiO3. The strain showed a strong dependence on the field frequency and is likely largely associated with domain switching involving predominantly non-180° domain walls. In addition, rearrangement of charged defects by applying electric field of low frequency depins these domain walls, resulting in a more efficient switching and, consequently, an increased response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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