Novel optical properties and induced magnetic moments in Ru-doped hybrid improper ferroelectric Ca3Ti2O7

被引：0
|
作者：
Xingxing WU [1 ]
Shouyu WANG [2 ]
Winnie WONG-NG [3 ]
Qiang GU [1 ]
Yao JIANG [1 ]
Chao WANG [1 ]
Shuang MA [2 ]
Weifang LIU [1 ]
机构：
[1] Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science, Tianjin University
[2] College of Physics and Material Science, Tianjin Normal University
[3] Materials Measurement Science Division, National Institute of Standards and Technology
来源：
Journal of Advanced Ceramics | 2021年 / 10卷 / 01期
基金：
中国国家自然科学基金;
关键词：
D O I：
暂无
中图分类号：
TQ174.7 [陶瓷制品];
学科分类号：
080503 ;
摘要：
Hybrid improper ferroelectric CaTiOand CaTiRuOceramics 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 k V/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 CaTiOis also discussed.
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页码：120 / 128
页数：9
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