Effects of Fe2+ on dielectric and magnetic properties in rare earth garnet type high entropy oxides

被引：4

作者：

Liu, Haowen ^{[1
,2
]}

Zhang, Jinrong ^{[1
,2
]}

Zhang, Xiaoyan ^{[1
,2
,3
]}

Bao, Ateer ^{[1
,2
]}

Qi, Xiwei ^{[1
,3
,4
]}

机构：

[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110189, Peoples R China

[2] Northeastern Univ Qinhuangdao, Sch Resources & Mat, Qinhuangdao 066004, Peoples R China

[3] Key Lab Dielect & Electrolyte Funct Mat, Qinhuangdao 066044, Hebei, Peoples R China

[4] North China Univ Sci & Technol, Coll Met & Energy, Tangshan 063210, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 15期

基金：

中国国家自然科学基金;

关键词：

High-entropy oxides; Garnet structure; Giant dielectric properties; Magnetism; CONSTANT; BARRIER;

D O I：

10.1016/j.ceramint.2024.05.044

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Given the important role played by the valence state of the transition metal in determining material this paper investigates the effect of Fe2+ content on the structure and dielectric properties of garnet-structured high entropy oxides (Y0.2Eu0.2Er0.2Dy0.2Lu0.2)(3)(Al-0.Fe-5(0.5))(5)O-12 through Fe2+ doping. The results of XPS and M.ssbauer spectra showed that the Fe2+ content in the tetrahedron increased with Fe2+ doping. With increasing Fe2+ content, the dielectric constants gradually increased, and the maximum dielectric constant reached 2.78 x 1(0)4 at 100 Hz under 30 degrees C. The analysis of the AC impedance spectrum and electrical conductivity revealed that the difference between the activation energy of grain boundary and grain conductivity resulted in increased dielectric constants of the samples. In addition, the doping of Fe2+ increased the maximum magnetization of the samples. This work provides a new idea for designing giant dielectric materials and magnetic materials with a high entropy strategy.

引用

页码：27453 / 27461

页数：9

共 50 条

[1] Structural, electric, and dielectric characterizations of La0.5Pr0.2Sr0.3Mn1-xFexO3 perovskite prepared by self combustion method [J].