Effect of neodymium doping on structure,magnetic properties and microwave absorption performance of SrMnO_(3)  

作　　者：Jixiang Yue Lichun Cheng Jilei Xiong Qingrong Yao Man Wang Yucheng Chen Qianxin Long Xiaojian Guo 

机构地区：[1]School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin,541004,China [2]Guangxi Key Laboratoryof Information Materials Guilin University of Electronic Technology,Guilin,541004,China [3]Anhui Jihua New Materials Co.,Ltd.,Anqing,246300,China

出　　处：《Journal of Rare Earths》2024年第2期354-363,I0005,共11页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51861006);Guangxi Science and Technology Project(AD19110010)。

摘　　要：A simple composite Sr_(1-x)Nd_(x)MnO_(3)(x=0,0.05,0.1,0.15,0.2) nano powders were successfully prepared by the sol-gel method as a light-weight broadband electromagnetic wave absorber.The effect of Nd^(3+)doping on the structure,microstructure and properties of SrMnO_(3) was investigated.It is found that with the doping of Nd^(3+),the space group of the SrMnO_(3) changes from p63/mmc to pm3m,and the crystalline shape starts to change from hexagonal to cubic crystalline.Scanning electron microscopy(SEM) and Brunauer-Emmett-Teller(BET) tests confirm that the particle sizes of the sample decrease and the specific surface area increases,which are attributed to the inhibition of grain growth after Nd^(3+)is doped.X-ray photoelectron spectroscopy(XPS) shows that after Nd^(3+)doping,the content of oxygen vacancy increases,and Mn^(4+) converts to Mn^(3+).Due to the defects of the materials,the polarization effect is enhanced,thus,the dielectric and magnetic properties of the doped samples are improved.The maximum reflection loss of the Sr_(0.85)Nd_(0.15)MnO_(3) is-33.41 dB at 7.84 GHz for a thickness of 2.4 mm,while Sr_(0.9)Nd_(0.1)MnO_(3) has the best bandwidth performance at 2.32 GHz with a reflection loss below-10dB.

关 键 词：Sr_(1-x)Mn_xO_(3) Crystal structure Microwave absorption Magnetic properties Nano powder Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]