Anisotropic exchange coupling interaction between hard-hard magnetic grains in sintered SrFe_(12)O_(19)ferrites  

作　　者：Shuang Zhang Chunxiang Cao Shubing Su Ailin Xia Huiyan Zhang Hailing Li Zhiyuan Liu Chuangui Jin 

机构地区：[1]School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,China [2]Analysis and Testing Central Facility,Anhui University of Technology,Maanshan 243002,China [3]School of Electronic and Information Engineering,Ningbo University of Technology,Ningbo 315016,China

出　　处：《Journal of Advanced Ceramics》2023年第4期815-821,共7页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51772004).

摘　　要：Exchange coupling interaction in sintered magnetic materials is generally isotropic.In this study,the anisotropic exchange coupling interaction was found in sintered oblate cylindrical SrFe_(12)O_(19)(SrM)specimens obtained by the SrM nanopowders synthesized via a hydrothermal method.According to Henkel plots,the exchange coupling interaction between hard-hard magnetic grains was found in both as-pressed and sintered specimens.However,the exchange coupling interaction can only be found in the in-plane direction but not in the out-of-plane direction for thel sintered specimens.By building a model of a grain configuration,this anisotropy of the exchange coupling interaction was ascribed to the vertically arranged plate-like SrM grains with micrometers in width but nanometers in thickness,which was confirmed by morphologies of cross sections in fractured specimens.

关 键 词：SrFe_(12)O_(19)(SrM)ferrite hydrothermal method anisotropic exchange coupling interaction Henkel plot 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]