Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Anhui University(Natural Sciences)》 2006-02
Add to Favorite Get Latest Update

Studies on the structure and magnetic properties of Co_xFe_(3-x)O_(4) nanoparticles

L Qing-rong,FANG Qing-qing,LI Rui,WANG Cui-ping(School of Physics and Material Science,Anhui University,Hefei 230039,China)  
Cobalt ferrite Co_xFe_(3-x)O_4(x=0.2~1.0) nanocrystalline powders were prepared by chemical coprecipitation method and annealed at temperatures from 1260℃ to 1340℃ in air,The structure and magnetic properties of the samples are measured and analyzed through the X-ray diffraction(XRD)patterns and vibrating sample magnetometer(VSM).The experimental results show that monophase Co_xFe_(3-x)O_4 ferrites with a spinel structure was formed at high Co~(2+) content(x≥0.7),while at the low Co~(2+) content((x0.7))Co_xFe_(3-x)O_4 phase and α-Fe_2O_3 phase was obtained at the same time,the specific saturation magnetization climbs up at first and falls down with the increase of the cobalt content.The maximum of σ_S was attained at the x=0.8.In the range of x=0.5~0.8,the coercivity H_c decreases with the increase of x,then climbs up rapidly.Higher σ_S and H_c can be achieved simultaneously in the vicinity of x=1.0.
【Fund】: 安徽省科学技术带头人基金资助项目(01080210)
【CateGory Index】: TM277
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved