Co_(0.7)Fe_(0.3)/CoFe_2O_4纳米复合材料的水热法一步合成与磁性  

One-step Hydro-thermal Synthesis and the Magnetic Property of Co_(0.7)Fe_(0.3)/CoFe_2O_4 Nanocomposite Materials

作　　者：吴娟[1] 霍德璇[1] 吕燕飞[1] 赵士超[1] 

机构地区：[1]杭州电子科技大学材料物理研究所,浙江杭州310018

出　　处：《磁性材料及器件》2009年第4期12-14,共3页Journal of Magnetic Materials and Devices

基　　金：2007年浙江省新苗人才计划资助项目(KYZ151107042-4)

摘　　要：采用水热法一步合成了Co0.7Fe0.3/CoFe2O4纳米复合材料。利用粉末X射线衍射(XRD)、透射电子显微镜(TEM)观察了纳米复合材料的结构及形貌。室温穆斯堡尔谱(MS)明显地由对应于尖晶石型钴铁氧体(CoFe2O4)和体心立方钴铁合金(Co0.7Fe0.3)的两组六线谱叠加而成。在室温下,利用振动样品磁强计(VSM)测量材料的磁滞回线,表明Co0.7Fe0.3/CoFe2O4纳米复合材料具有较高的比饱和磁化强度(Ms=84.82A·m2/kg)和矫顽力(μ0Hc=0.15T)。Co0.7Fe0.3/CoFe2O4 nanocomposites were successfully synthesized by hydrothermal process in one-step. Powder X-ray diffraction （XRD） and transmission electron microscopy （TEM） were used to investigated the microstructure and morphology of the as-prepared samples. Room-temperature M6ssbauer spectra （MS） of these nanocomposites are composed of two well defined magnetic component sextets, which are corresponding to that of Co0.7Fe0.3 alloy and CoFe2O4 ferrite. Magnetic hysteresis loops measured with a vibrating sample magnetometer （VSM） showed that, compared to pure CoFe2O4 ferrite, the Co0.7Feo0.3/CoFe2O4 nanocomposite has enhanced saturation magnetization （Ms = 84.82 A·m^2/kg） and slightly lower coercivity （porte=0.15T） at room temperature.

关 键 词：Co0.7Fe0.3/CoFe2O4纳米复合材料 水热法 微结构 饱和磁化强度 

分 类 号：TM277.1[一般工业技术—材料科学与工程]