Quasi-Amorphous Inorganic Thin Films: Non-Crystalline Polar Phases

Ellen Wachtel; Igor Lubomirsky

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Quasi-Amorphous Inorganic Thin Films: Non-Crystalline Polar Phases

机译：准非晶态无机薄膜：非晶体极性相

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Quasi-amorphous thin films of BaTiO_3, SrTiO_3, and BaZrO_3 are the only known examples of inorganic, non-crystalline, polar materials. The conditions under which they are formed and the origin of their polarity set these materials apart from other classes of inorganic materials. The most important feature of the quasi-amorphous phase is that the polarity is the result of the orientational ordering of local bonding units but without any detectable spatial periodicity. This mechanism is reminiscent of that observed in ferroelectric polymers and permits compounds that do not have polar crystalline polymorphs, such as SrTiO_3 and BaZrO_3, to form polar non-crystalline solids. In the present report, we provide an overview of the essential features of these materials including preparation, structure, and chemical composition. The report also reviews our current level of understanding and offers some guidelines for further development and application of non-crystalline inorganic polar materials.

机译：BaTiO_3，SrTiO_3和BaZrO_3的准非晶薄膜是无机，非晶态极性材料的唯一已知示例。它们的形成条件和极性的起源使这些材料与其他种类的无机材料区分开。准非晶相的最重要特征是极性是局部键合单元取向顺序的结果，但没有任何可检测的空间周期性。该机理使人联想到铁电聚合物中观察到的机理，并允许不具有极性结晶多晶型物的化合物（例如SrTiO_3和BaZrO_3）形成极性非晶态固体。在本报告中，我们概述了这些材料的基本特征，包括制备，结构和化学组成。该报告还回顾了我们目前的理解水平，并为进一步开发和应用非晶态无机极性材料提供了一些指导。

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《Advanced Materials》 |2010年第23期|P.2485-2493|共9页
作者
Ellen Wachtel; Igor Lubomirsky;
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Department of Materials & Interfaces, Weizmann Institute of Science Rehovot 76100 (Israel);

Department of Materials & Interfaces, Weizmann Institute of Science Rehovot 76100 (Israel);

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Quasi-Amorphous Inorganic Thin Films: Non-Crystalline Polar Phases

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