title: Probing the local coordination environment for transition metal dopants in zinc oxide nanowires.
abstract: It is hypothesized that a highly ordered, relatively defect-free dilute magnetic semiconductor system should act as a weak ferromagnet. Transition-metal-doped ZnO nanowires, being single crystalline, single domain, and single phase, are used here as a model system for probing the local dopant coordination environments using X-ray absorption spectroscopy and diffraction. Our X-ray spectroscopic data clearly show that the dopant resides in a uniform environment, and that the doping does not induce a large degree of disorder in the nanowires. This homogeneous nature of the doping inside the oxide matrix correlates well with observed weakly ferromagnetic behavior of the nanowires.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 947202, USA.
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Yuhas
authors.forename: Sirine
authors.initials: S
authors.lastname: Fakra
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Marcus
authors.forename: Peidong
authors.initials: P
authors.lastname: Yang
mesh_terms: D016880:Anisotropy; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties; D028561:Transition Elements / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D028561:Transition Elements; D015034:Zinc Oxide