镧离子掺杂对钴铁氧体磁性能的影响  

Influence of Doped La^(3+) on Magnetic Properties of Cobalt Ferrites

作　　者：夏晓祥 施刘健 晋传贵[1] 王坤[1] 夏爱林[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243032

出　　处：《安徽工业大学学报（自然科学版）》2016年第3期224-228,共5页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金项目(21071003;1201002);国家大学生创新基金项目(AH201410360146)

摘　　要：采用水热法制备镧离子掺杂的钴铁氧体粉末CoFe_(2-x)La_xO_4(x=0,0.05,0.10,0.20,0.40,0.80),采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)以及振动样品磁强计(VSM)等设备,分析研究镧离子掺杂量对钴铁氧体结构、形貌及磁性能的影响。结果表明:随着所钴铁氧体中镧离子掺杂量的提高,钴铁氧体的XRD衍射峰强度逐渐降低;在x=0.10处出现第二相La(OH)_3;第二相出现后颗粒间的团聚现象明显减弱;饱和磁化强度从63.856(A·m^2)/kg逐渐减小到25.539(A·m^2)/kg,而矫顽力先从71.14 k A/m减小至38.18 k A/m后,再增大到160.45 k A/m。La^3 ＋ doped cobalt ferrite CoFe2- xLaxO4（x=0, 0.05, 0.10, 0.20, 0.40, 0.80）powders were prepared viahydrothermal method. The influence of doped La^3 ＋ content on the structures, morphologies and magneticproperties of cobalt ferrites was studied by X-ray diffractionmeter（XRD）, scanning electron microscope （SEM）and vibrating sample magnetometer （VSM）. The results show that with the increase of doped La3 ＋ content, XRDdiffraction peak intensities of as- prepared cobalt ferrites are reduced,and the second phase appears at x=0.10.Agglomeration of particles is significantly alleviated at x≥0.10. The saturation magnetization decreases graduallyfrom 63.856 （A·m^2）/kg to 25.539 （A·m^2）/kg, while the coercivity firstly decreases from 71.14 kA/m to 38.18 kA/mand then increases to 160.45 kA/m.

关 键 词：镧离子 钴铁氧体 水热法 掺杂 磁性能 

分 类 号：TB34[一般工业技术—材料科学与工程]