期刊
MATERIALS LETTERS
卷 170, 期 -, 页码 85-88出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.02.004
关键词
BiFeO3; Ferroelectrics; Optical and magnetic properties; Sol-gel preparation; Thin films
资金
- National Natural Science Foundation of China [61474045]
- State Key Basic Research Program of China [2013CB922300]
Bi0.9Sm0.1Fe0.3 (BSF), Bi0.9Sm0.1Fe0.95Me0.05O3 (BSFM) and Bi0.9Sm0.1Fe0.9Mn0.05Ni0.005O3 (BSFMN) thin films were grown on the quartz substrates by a sol-gel technique, respectively. Structural characterizations and microstructural analysis show that all the films exhibit polycrystalline perovskite structures with dense and smooth microstructures. The most intense diffraction peak (110) shifts toward lower diffraction angles, which is associated with lattice strain estimated by Williamson-Hall analysis model. Moreover, optical absorption spectra indicate that the co-doping of Sm, Mn and Ni has an effect on the energy band structure. The band gap of the films decreases from 2.61 eV (BSF) to 2.46 eV (BSFMN). Furthermore, the BSFMN film exhibits a maximum saturated magnetization compared with BSF and BSFM films, which mainly stems from the local ferromagnetic spin configuration. (C) 2016 Elsevier B.V. All rights reserved.
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