title: Intrinsic ferromagnetism in nanocrystalline Mn-doped ZnO depending on Mn concentration.
abstract: The physical properties of Zn(1-x)Mn(x)O nanoparticles synthesized by thermal decomposition are extensively investigated by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman light scattering and Hysteresis measurements. XRD and XPS spectra reveal the absence of secondary phase in nanocrystalline ZnO doped with 5% or less Mn; and, later confirms that the valance state of Mn to be 2+ for all the samples. Raman spectra exhibit a peak at 660 cm(-1) which we attribute to the intrinsic lattice defects of ZnO with increasing Mn concentration. Overall, our results demonstrate that ferromagnetic properties can be realized while Mn-doped ZnO obtained in the nanocrystalline form.
authors.affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan.
authors.forename: Munisamy
authors.initials: M
authors.lastname: Subramanian
authors.forename: Masaki
authors.initials: M
authors.lastname: Tanemura
authors.forename: Takehiko
authors.initials: T
authors.lastname: Hihara
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Soga
authors.forename: Takashi
authors.initials: T
authors.lastname: Jimbo
mesh_terms: D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008345:Manganese / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D008345:Manganese; D015034:Zinc Oxide