Low Temperature Heat Capacity of Zn Substituted Cobalt Ferrite Nanosphere:The Relation between Magnetic Properties and Microstructure  

作　　者：YUAN Meng GU Xiaojie FU Jie WANG Shaoxu SHI Quan TAN Zhicheng XU Fen 

机构地区：[1]College of Environmental and Chemical Engineering,Dalian Jiaotong University,Dalian I16028,China [2]Thermochemistry Laboratory,Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian Il6023,China [3]Guangxi Key Laboratory of Information Materials(Guilin University of Electronic Technology),Guilin 541000,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第5期984-995,共12页武汉理工大学学报（材料科学英文版）

基　　金：Basic Research Project of Liaoning Provincial Department of Education(No.LJKMZ20220829);Guangxi Key Laboratory of Information Materials(Guilin University of Electronic Technology)(No.211006-K)。

摘　　要：Co_((1-x))ZnxFe_(2)O_(4)nanospheres(x=0,0.5,0.8)with a unidirectional cubic spinel structure were prepared by a solvothermal method.By using a range of theoretical and empirical models,the experimental heat capacity values were fitted as a function of temperature over a suitable temperature range to explain the possible relationship between the magnetic properties and microstructure of the nanospheres.As a result,at a low temperature(T<10 K),the parameter Bfswdecreases with increasing Zn concentration,implying that the exchange interaction between A and B sites decreases.At a relatively high temperature(T>50 K),the Debye temperature decreases with increasing Zn concentration,which is due to the weakening of the interatomic bonding force after the addition of non-magnetic materials to the Co Fe_(2)O_(4)spinel ferrite.

关 键 词：Co-Zn spinal ferrite nanospheres magnetic properties heat capacity thermodynamic functions PPMS 

分 类 号：TG1[金属学及工艺—金属学]