Structural Dielectric and Impedance Spectroscopy of YBaCuFeO5
DAE SOLID STATE PHYSICS SYMPOSIUM 2019(2020)
摘要
The layered Perovskite compounds play important role in solid state physics due to their intriguing physical properties. We have investigated the structural, complex dielectric and impedance properties of layered perovskite compound YBaCuFeO5(YBCFO). The YBCFO crystallizes in a non-centrosymmetric crystal structure with space group P4mm.The frequency dependent dielectric permittivity (epsilon') shows two relaxation peaks. Both peaks shift towards higher frequency with increasing temperature and follow Arrhenius behaviour with activation energies 0.24 and 0.13 eV respectively. The Nyquist plot resolves the contributionsfrom grain and grain boundaries. The grain boundary contribution dominates at higher temperatures whereas at lower temperature only grain contribution remains. The dielectric measurement combined with Nyquist plots shows that first relaxing peak arises due to grain contribution and hence represents the materials property, whereas the second peaks arises out of grain-boundary contribution.
更多查看译文
关键词
structural dielectric,impedance spectroscopy
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要