Spatially-Resolved Study of Magnetic Properties of Mn-Doped ZnO Quantum Wires

摘要: ZnO nanowires prepared by thermal growth following direct chemical synthesis and doped Mn Sn impurities were investigated. The show a single crystal structure strong blue shift of the near band edge luminescence, which is attributed to quantum confinement eect. magnetic susceptibility wires as function temperature demonstrated Curie-Weiss behavior. Hysteresis with coercive field <200 Oe was clearly observed in magnetization versus curves at 300 K. Increasing concentration co-doping significantly increased hysteresis ferromagnetic behavior nanowires. Magnetic force microscopy measurements high spatial resolution revealed domain individual wires. domains align perpendicular surface can be controlled using an external field.