Zn_(0.95)Fe_(0.05-x)Ni_xO稀磁半导体的光学与磁学性能  

Optical and magnetic properties of Fe and Ni co-doped ZnO dilute magnetic semiconductors

作　　者：张玲玲[1] 魏智强[1,2] 武晓娟[1,2] 吴永富[1] 王璇[1] 

机构地区：[1]兰州理工大学理学院,兰州730050 [2]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《粉末冶金材料科学与工程》2014年第4期584-588,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(51261015);甘肃省自然科学基金资助项目(1308RJZA238)

摘　　要：利用水热法制备不同掺杂比例的Zn0.95Fe0.05-xNixO(x=0.025,0.03,0.04)稀磁半导体材料,采用高分辨透射电子显微镜(HRTEM)、X射线衍射(XRD)、光致发光光谱(PL)、拉曼(Raman)光谱和振动样品磁强计(VSM)对样品的形貌、晶体结构、光学性能和磁学性能进行表征。实验结果表明,水热法制备的样品形貌为纳米棒状,结晶性良好,具有纤锌矿结构。掺杂的Fe和Ni元素进入到了ZnO晶体中,Zn2+被Fe2+、Ni2+替换,晶体的拉曼光谱发生红移,光致发光光谱发生猝灭现象。同时随掺杂量增加,样品的饱和磁化强度增强,在室温条件下存在明显的铁磁性。Diluted magnetic semiconductors Zn0.95Fe0.05-xNixO（x= 0.025, 0.03, 0.04） with different consistency ratios were synthesized by hydrothermal method. The crystal structure, morphology, optical and magnetic properties of the samples were characterized by high-resolution transmission electron microscopy（HRTEM）, X-ray diffraction（XRD）, photoluminescence spectra（PL）, Raman scattering spectra and the vibrating sample magnetometer（VSM）.The results show that all samples synthesized by this method possess wurtzite structure with good crystallization, and the morphology is nanorods. All the Fe^2＋ and Ni^2＋ substituted for the lattice site of Zn^2＋ and generate single- phase Zn0.95Fe0.05-xNixO. Raman spectra occurs red shift, the photoluminescence intensity are quenched. In addition, the saturation magnetization increases with increasing of iron and nickel doping content, and the obvious ferromagnetic is found in all of the Fe-Ni：ZnO sample at room temperature.

关 键 词：ZN0 95Fe0 05-xNixO 水热法 光学性能 磁学性能 

分 类 号：O472.5[理学—半导体物理]