title: Magnetic Properties of Ni-doped ZnO Nanocombs by CVD Approach.
abstract: The search for above room temperature ferromagnetism in dilute magnetic semiconductors has been intense in recent year. Arrays of perpendicular ferromagnetic nanowire/rods have recently attracted considerable interest for their potential use in many areas of advanced nanotechnology. We report a simple low-temperature chemical vapor deposition (CVD) to create self-assembled comb-like Ni-/undoped ZnO nanostructure arrays. The phases, compositions, and physical properties of the studied samples were analyzed by different techniques, including high-resolution X-ray diffraction/photoelectron spectroscopy/transmission electron microscopy, photoluminescence, and MPMS. In particular, the Ni-doped ZnO nanocombs (NCs) with ferromagnetic and superparamagnetic properties have been observed whereas undoped ZnO NCs disappear. The corresponding ferromagnetic source mechanism is discussed, in which defects such as O vacancies would play an important role.
authors.affiliation: Key Lab for Special Functional Materials of Ministry of Education, Henan University, 475004, Kaifeng, People's Republic of China. smzhou@henu.edu.cn.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Shaomin
authors.forename: Yuan
authors.initials: Y
authors.lastname: Honglei
authors.forename: Liu
authors.initials: L
authors.lastname: Lisheng
authors.forename: Chen
authors.initials: C
authors.lastname: Xiliang
authors.forename: Lou
authors.initials: L
authors.lastname: Shiyun
authors.forename: Hao
authors.initials: H
authors.lastname: Yaoming
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ruijian
authors.forename: Li
authors.initials: L
authors.lastname: Ning