桂林电子科技大学学报Issue(5)：498-504,7.DOI:10.16725/j.1673-808X.2022178
CeCrO3的制备及磁、介电性能
Preparation,magnetic and dielectric properties of CeCrO3
摘要
Abstract
CeCrO3 single-phase polycrystalline samples were prepared by combustion synthesis technology.The structural,magnetic and dielectric properties of CeCrO3 were characterized by X-ray diffractometers,field emission scanning electron microscopes and physical property measurement systems.Magnetization measurements show that the magnetic phase transition of CeCrO3 sample oc-curs near 260 K.There is a linear relationship between the reciprocal of the magnetic susceptibility of the highly docile magnetic segment and the temperature,which indicates that CeCrO3 obeys Curie Weiss's law.The Curie-Weiss temperature is a negative val-ue(-292.1 K),indicating the antiferromagnetic coupling between Cr sublattice moments.In addition,there exists magnetization re-versal at 120 K,due to the interaction between weak ferromagnetic component in tilt antiferromagnetism of Cr sublattice and re-verse magnetic moment of paramagnetic R sublattice due to reverse internal field polarization of Cr.The reciprocal of the dc mag-netic susceptibility(1/x)varies linearly in a high temperature region,which follows the Curie-Weiss law.Magnetization reversals are attributed to the antiferromagnetic coupling between the R3 moments and Cr3+moments.The dielectric curves exhibit a thermal acti-vation relaxation caused by Max,and the dispersion phenomenon was observed near 270 K.The Jonscher equation is used to fit the ac conductivity,the results show that the carrier conduction in the sample can be understood by the mechanism of correlated barrier hopping(CBH).关键词
燃烧合成/反铁磁耦合/磁化反转/麦克斯韦-瓦格纳效应/关联势垒跳跃Key words
combustion synthesis/antiferromagnetic coupling/magnetization reversal/Maxwell-Wagner effect/correlated barrier hopping分类
通用工业技术引用本文复制引用
张亚乐,樊利国,王松伟,张鑫,崔梦范,杨瑞鑫,邓胜龙,周欣..CeCrO3的制备及磁、介电性能[J].桂林电子科技大学学报,2024,(5):498-504,7.基金项目
国家自然科学基金(51802052) （51802052）
广西信息材料重点实验室基金(191004-Z,201021-Z,201020-Z,211014-Z) （191004-Z,201021-Z,201020-Z,211014-Z）
