title: Ferromagnetic ordering in Mn-doped ZnO nanoparticles.
abstract: Zn1 - x Mn 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.
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Xi
authors.initials: X
authors.lastname: Luo
authors.affiliation: Bragg Institute, ANSTO, New Illawarra Road, Lucas Heights NSW 2234, Australia.
authors.forename: Wai-Tung
authors.initials: WT
authors.lastname: Lee
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Guozhong
authors.initials: G
authors.lastname: Xing
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, 10 Kent Ridge Road, Singapore 119260, Singapore.
authors.forename: Nina
authors.initials: N
authors.lastname: Bao
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Adnan
authors.initials: A
authors.lastname: Yonis
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Dewei
authors.initials: D
authors.lastname: Chu
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Jiunn
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, 10 Kent Ridge Road, Singapore 119260, Singapore.
authors.forename: Jun
authors.initials: J
authors.lastname: Ding
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Sean
authors.initials: S
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, University of New South Wales, Kensington, 2 High Street, Sydney, NSW 2052, Australia.
authors.forename: Jiabao
authors.initials: J
authors.lastname: Yi
keywords: Diluted magnetic semiconductor; Nanoparticles; Room-temperature ferromagnetism; ZnO