首页 | 本学科首页   官方微博 | 高级检索  
     


Downward self‐polarization of lead‐free (K0.5Na0.5)(Mn0.005Nb0.995)O3 ferroelectric thin films on Nb:SrTiO3 substrate
Authors:Hae Jin Seog  Chang Won Ahn  Shinuk Cho  Kwang‐Eun Kim  Chan‐Ho Yang  Tae Yeong Koo  Sun‐Young Lee  Jong Pil Kim  Ill Won Kim
Affiliation:1. Department of Physics and Energy Harvest‐Storage Research Center, University of Ulsan, Ulsan, Republic of Korea;2. Department of Physics, KAIST, Daejion, Republic of Korea;3. Pohang Accelerator Laboratory, Pohang, Gyungbuk, Republic of Korea;4. Division of Analysis and Research, Korea Basic Science Institute, Busan, Republic of Korea
Abstract:Spontaneously appearing macroscopic polarization (self‐polarization) in ferroelectrics without an electrode or an external electric field would enable the freedom to design many ferroelectric heterostructures and devices. The (K0.5Na0.5)(Mn0.005Nb0.995)O3 (KNMN) thin film was grown on Nb:SrTiO3 single‐crystal substrate and the resultant self‐polarization behavior due to strain relaxation was investigated. The lattice mismatch and difference in TEC between the KNMN thin film and the Nb:SrTiO3 substrate creates a compressive strain. The compressive strain gradient may be the main cause for the observed downward self‐polarization. The downward self‐polarization of the KNMN thin film can be explained by the strong inhomogeneous compressive strain caused by strain relaxation. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)
Keywords:lead‐free ferroelectrics  self‐polarization  (K,Na)NbO3  thin films  strain
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号