ZnCoO稀磁半导体的室温磁性

采用固相反应法，将ZnO和Co₂O₃粉末按不同的成分配比混合，制备了稀磁半导体Zn_1-xCo_xO (x=0.02,0.06,0.10)材料.并使用H₂气氛退火技术对样品进行了处理，得到了具有室温铁磁性的掺Co氧化锌稀磁半导体.利用全自动X射线衍射仪、X射线光电子能谱仪、高分辨透射电子显微镜和超导量子干涉器件磁强计对样品的结构、晶粒的尺寸、微观形貌以及磁性等进行了测量和标度. 关键词： 稀磁半导体 氧化锌 掺杂 固相反应法

Room-temperature ferromagnetism in Co-doped ZnO diluted magnetic semiconductor

The room-temperature ferromagnetism (RTFM) of Co-doped zinc oxide are reported in this paper. The Zn_1-xCo_xO (x=0.02, 0.06, 0.10) specimens were synthesized by solid state reaction of the mixture of ZnO and Co₂O₃ powders. The specimens were then annealed in the hydrogenation ambience. The RTFM was found in the hydrogenated samples, and the hysteresis loops of the hydrogenated Co-doped ZnO samples were measured at 300 K by using the superconducting quantum interference device magnetometer. The samples were further measured by X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy.