文章基本信息

标题：Vertical Interface Induced Dielectric Relaxation in Nanocomposite (BaTiO₃)_1-x:(Sm₂O₃)_x Thin Films
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作者：Weiwei Li ; Wei Zhang ; Le Wang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep11335
出版社：Springer Nature
摘要：Vertical interfaces in vertically aligned nanocomposite thin films have been approved to be an effective method to manipulate functionalities. However, several challenges with regard to the understanding on the physical process underlying the manipulation still remain. In this work, because of the ordered interfaces and large interfacial area, heteroepitaxial (BaTiO₃)_1-x:(Sm₂O₃)_x thin films have been fabricated and used as a model system to investigate the relationship between vertical interfaces and dielectric properties. Due to a relatively large strain generated at the interfaces, vertical interfaces between BaTiO₃ and Sm₂O₃ are revealed to become the sinks to attract oxygen vacancies. The movement of oxygen vacancies is confined at the interfaces and hampered by the misfit dislocations, which contributed to a relaxation behavior in (BaTiO₃)_1-x:(Sm₂O₃)_x thin films. This work represents an approach to further understand that how interfaces influence on dielectric properties in oxide thin films.