溶胶-凝胶法制备Cu/ZnO的室温铁磁性  

Room temperature ferromagnetism in Cu/ZnO prepared by sol-gel method

作　　者：崔正南[1] 许怀哲[1] 郝维昌[1] 李建军[1] 

机构地区：[1]北京航空航天大学物理科学与核能工程学院,北京100083

出　　处：《复合材料学报》2009年第4期126-129,共4页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(60776067)

摘　　要：为研究稀磁性半导体的室温铁磁性来源,采用溶胶-凝胶法制备了Cu掺杂ZnO半导体粉末。X射线衍射光谱显示Cu在ZnO中的固溶度小于0.08(摩尔比);透射电子显微镜分析显示颗粒尺寸较为均匀,呈单结晶态;振动样品磁强计测试表明,Cu/ZnO具有室温铁磁性。由于Cu本身不具有任何磁性,样品的铁磁性来源为氧化锌晶格中的缺陷与Cu2+离子之间的交换作用。Cu doped ZnO powder was prepared by the sol - gel method in order to study the origin of room temperature ferromagnetism of ZnO-based diluted magnetic semiconductors. X-ray diffraction spectra show that the solid solubility of Cu in ZnO was 0.08 （mole ratio） ; TEM indicate that the Cu/ZnO particles are crystalline and uniform in size. The vibrating sample magnetometer measurements show that the Cu/ZnO powders are of room temperature ferromagnetism. As Cu itself does not have any magnetic properties, the origin of the observed room temperature ferromagnetism of Cu/ZnO could only be attributed to the exchange interaction between the defects of zinc oxide and the doped Cu ions.

关 键 词：稀磁性半导体 溶胶-凝胶法 Cu/ZnO 室温铁磁性 

分 类 号：TN304.7[电子电信—物理电子学]