Browsing by Author "Bao, N"

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    Ferromagnetic ordering in Mn-doped ZnO nanoparticles
    (Springer, 2014-01-01) Luo, X; Lee, WT; Xing, GZ; Bao, N; Yonis, A; Chu, D; Lee, J; Ding, J; Li, S; Yi, JB
    Zn1 - xMn x O nanoparticles have been synthesized by hydrothermal technique. The doping concentration of Mn can reach up to 9 at% without precipitation or secondary phase, confirmed by electron spin resonance (ESR) and synchrotron X-ray diffraction (XRD). Room-temperature ferromagnetism is observed in the as-prepared nanoparticles. However, the room-temperature ferromagnetism disappears after post-annealing in either argon or air atmosphere, indicating the importance of post-treatment for nanostructured magnetic semiconductors.© 2014 Luo et al.; licensee Springer.