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首页> 外文期刊>Journal of Applied Physics >Dielectric and electro-mechanic nonlinearities in perovskite oxide ferroelectrics, relaxors, and relaxor ferroelectrics
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Dielectric and electro-mechanic nonlinearities in perovskite oxide ferroelectrics, relaxors, and relaxor ferroelectrics

机译：钙钛矿氧化铁铁电，松弛器和松弛氧化铁铁电介质和电力机械非线性

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摘要

The polarization and strain response of ferroelectric materials at electric fields below the macroscopic coercive field is of paramount importance for the operation of many electronic devices. The response of real ferroelectric and related materials is, in general, complex and difficult to interpret. The reason for this is that many processes in a ferroelectric material contribute to its properties, often concurrently. Examples include the motion of ferroelectric and ferroelastic domains, the presence of domains within domains, the dynamics of different types of polar nano-entities, the interaction of polar nano-entities (e.g., polar nanoregions in relaxors) with the strain and polarization within domains, motion of defects, and rearrangement of defect clusters and their interaction with polarization and strain. One signature of these processes is nonlinearity of the strain and polarization. Most ferroelectrics exhibit nonlinear response at all practical field levels, meaning that the apparent material coefficients depend on the amplitude of the driving excitation. In this paper, we show that an investigation of nonlinear behavior is a sensitive way to study various mechanisms operating in dielectric and piezoelectric materials. We review the basic formalism of the nonlinear description of polarization and strain, give a physical interpretation of different terms, and illustrate this approach on numerous examples of relaxors, relaxor ferroelectrics, hard and soft ferroelectrics, and morphotropic phase boundary compositions. An experimental approach based on a lock-in technique that is well suited for such studies is also discussed.
机译：在宏观矫顽场下方电场的铁电材料的偏振和应变响应对于许多电子设备的操作至关重要。实际铁电和相关材料的响应通常，复杂，难以解释。原因是铁电材料中的许多过程往往有助于其性质。实例包括铁电和铁弹性结构域的运动，结构域内的结构域，不同类型的极性纳米实体的动力学，极性纳米实体的相互作用（例如，在池中的放置中的极性纳米导致）在畴内具有应变和极化缺陷的运动，缺陷簇的重排及其与偏振和菌株的相互作用。这些过程的一个签名是应变和极化的非线性。大多数铁电器在所有实际场所上表现出非线性响应，这意味着表观材料系数取决于驱动激发的幅度。在本文中，我们表明，对非线性行为的研究是研究在介电和压电材料中操作的各种机制的敏感方式。我们审查了极化和应变的非线性描述的基本形式主义，给出了不同术语的物理解释，并说明了在众多松弛剂，松弛铬电气，硬质和软铁电器和Morphotopic相位边界组合物的众多示例中的这种方法。还讨论了基于适合这些研究的锁定技术的实验方法。

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  • 来源
    《Journal of Applied Physics》 |2021年第5期|054101.1-054101.14|共14页
  • 作者

    Lukas M. Riemer; Li Jin; Hana Ursic; Mojca Otonicar; Tadej Rojac; Dragan Damjanovic;

  • 作者单位

    Group for Ferroelectrics and Functional Oxides Swiss Federal Institute of Technology in Lausanne-EPFL 1015 Lausanne Switzerland;

    Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric Research School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China;

    Electronic Ceramics Department Jozef Stefan Institute Jamova Cesta 39 1000 Ljubljana Slovenia;

    Electronic Ceramics Department Jozef Stefan Institute Jamova Cesta 39 1000 Ljubljana Slovenia;

    Electronic Ceramics Department Jozef Stefan Institute Jamova Cesta 39 1000 Ljubljana Slovenia;

    Group for Ferroelectrics and Functional Oxides Swiss Federal Institute of Technology in Lausanne-EPFL 1015 Lausanne Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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