采用柠檬酸盐法合成了一系列Zn1-xCuxO(x=0.01,0.02,0.03,0.04)纳米粒子,XRD结果表明Zn1-xCuxO样品为单一的ZnO纤锌矿结构.磁性测试结果表明Zn1-xCuxO(x=0.01,0.02,0.03,0.04)在室温下表现为铁磁性.XRD,TEM与XPS的测试结果表明,样品中没有具有铁磁性的第二相出现.经分析Zn1-xCuxO(x=0.01,0.02,0.03,0.04)的铁磁性是Cu掺杂ZnO纳米结构的本质特征.
A series of Zn1-x Cux O (x = 0. 01,0. 02,0. 03,0. 04) nanoparticles were synthesized from Zn nitrate and Cu nitrate reduced by citrate. X-ray diffraction (XRD) shows that Zn1-x Cu/O samples are single phase with ZnO-like wurtzite structure. Magnetic measurements indicate that Zn1-xCuxO (x = 0. 01,0. 02,0. 03,0. 04) are ferromagnetic at room temperature. XRD, transmission electron microscope (TEM) analysis,and X-ray photoelectron spectroscopy (XPS) reveal that no ferromagnetic-related secondary phase was detected. The ferromagnetism in Zn1-x CuxO(x≤0.04) is intrinsic.