Author:
Wu Xingxing,Wang Shouyu,Wong-Ng Winnie,Gu Qiang,Jiang Yao,Wang Chao,Ma Shuang,Liu Weifang
Abstract
AbstractHybrid improper ferroelectric Ca3Ti2O7 and Ca3Ti19Ru0.1O7 ceramics were successfully synthesized by conventional solid-state reaction method. Two strongest diffraction peaks located around 2θ = 33° shifted towards the lower angle region with Ru substitution, reflecting structure variation. Grain growth and higher oxygen vacancy concentration after doping resulted in a reduction in the coercive field about 20 kV/cm. Optical bandgap estimated by UV-vis diffuse reflectance (DR) spectrum and X-ray photoelectron spectroscopy (XPS) valence band spectra showed a decreasing trend due to the existence of impurity energy level upon Ru doping, which was consistent with the results of first-principles calculations. The origin of the unexpected induced magnetic moments in Ru-dope Ca3Ti2O7 is also discussed.
Publisher
Springer Science and Business Media LLC
Subject
Ceramics and Composites,Electronic, Optical and Magnetic Materials
Cited by
17 articles.
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