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The structural, dielectric, and magnetic properties of GdMnO 3 multiferroic ceramics
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-01-20 , DOI: 10.1007/s10854-020-02909-7
Fengjiao Ye , Haiyang Dai , Manman Wang , Jing Chen , Tao Li , Zhenping Chen

Abstract

GdMnO3 (GMO) ceramics were prepared by solid-state reaction method, the structure, defects, dielectric, and magnetic properties of GMO ceramics sintered at different temperatures have been studied. Characterization by XRD indicates that impurity phase-free GMO can be synthesized at 1350 °C. SEM measurements show that the grain size of GMO increases and the microstructure becomes denser with increasing sintering temperature. Positron annihilation results reveal that the vacancies concentration decreases when sintering temperature increases from 1300 to 1350 °C, and then increases when sintering temperature increases from 1350 to 1400 °C. Dielectric measurements indicate that the GMO ceramic sintered at 1350 °C presents higher dielectric constant and smaller dielectric loss. Magnetic properties measurements show that the magnetic properties of GMO can be modulated by sintering temperature. The relation between structure and properties implies that the cation vacancy defect has remarkable effects on the dielectric and magnetic properties of GMO.



中文翻译:

GdMnO 3多铁陶瓷的结构,介电和磁性

摘要

氧化锰3通过固相反应法制备了(GMO)陶瓷,研究了在不同温度下烧结的GMO陶瓷的结构,缺陷,介电和磁性能。XRD表征表明,可以在1350°C的温度下合成无杂质的GMO。SEM测量表明,随着烧结温度的升高,GMO的晶粒尺寸增大,微观结构变得致密。正电子an没结果表明,当烧结温度从1300升高到1350°C时,空位浓度降低,而当烧结温度从1350升高到1400°C时空位浓度升高。介电测量表明,在1350°C下烧结的GMO陶瓷具有较高的介电常数和较小的介电损耗。磁性能测量表明,GMO的磁性能可以通过烧结温度来调节。结构与性能之间的关系表明,阳离子空位缺陷对GMO的介电和磁性能有显着影响。

更新日期:2020-01-21
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