Structural,electrical and magnetic properties of cobalt ferrite with Nd^(3+) doping  

作　　者：Regaty Anitha Reddy Kattepogu Rama Rao Bitra Rajesh Babu Guthikonda Kiran Kumar Cherukupalli Rajesh Anindita Chatterjee Nadella Krishna Jyothi 

机构地区：[1]Department of Physics,Koneru Lakshmaiah Education Foundation,Vaddeswaram,Guntur,Andhra Pradesh 522502,India [2]Department of Physics,Andhra University,Visakhapatnam,Andhra Pradesh 530003,India [3]Department of Physics,G.V.P.College of Engineering for Women,Visakhapatnam,Andhra Pradesh 530048,India [4]Department of Physics,Raghu College of Engineering(A),Bheemunipatnam,Visakhapatnam,Andhra Pradesh 531162,India [5]Department of Physics,Gayatri Vidya Parishad College of Engineering(Autonomous),Visakhapatnam,Andhra Pradesh 530048,India [6]Department of Chemistry,Raghu College of Engineering(A),Bheemunipatnam,Visakhapatnam,Andhra Pradesh 531162,India

出　　处：《Rare Metals》2022年第1期240-245,共6页稀有金属（英文版）

基　　金：Authors would like to thank the management of Koneru Lakshmaiah Education Foundation for giving us the support and encouragement to do research.RAR,GKK,NKJ would like to thank Department of Science and Technology(DST),Govt.of India,for the award of DST-FIST Level-1(SR/FST/PS-1/2018/35)scheme to Department of Physics,KLEF.

摘　　要：A systematic study on the influence of Nd^(3+) substitution on structural,magnetic and electrical properties of cobalt ferrite nanopowders obtained by sol–gel auto-combustion routewas reported.The formation of spinel phasewas confirmed by X-ray diffraction(XRD)data,and percolation limit ofNd3?into the spinel lattice was also observed.Fourier transform infrared spectroscopy(FTIR)bands observed ≈580 and ≈390 cm^(-1 ) support the presence of Fe^(3+) at A andBsites in the spinel lattice.The variation in microstructure was investigated by scanning electronmicroscopy(SEM),and the average grain size varies from 5.3 to 3.3 lm.The substitution of Nd^(3+) significantly affects the formation of pores and grain size of cobalt ferrite.Room-temperature saturation magnetization and coercivity decrease from 60 to 30 mA·m^(2)·g^(-1) and 19.9–17.8 mT,respectively,with Nd^(3+) substitution increasing.These decreases in magnetic properties are explained based on the presence of non-magnetic nature of Nd^(3+) concentration and the dilution of super-exchange interaction in the spinel lattice.The room-temperature direct-current electrical resistivity increases with Nd^(3+) concentration increasing,which is due to the unavailability of Fe^(2+) at octahedral B sites.

关 键 词：Co-Nd ferrite Saturation magnetization DC resistivity 

分 类 号：TB34[一般工业技术—材料科学与工程]