title: Adjacent Fe-Vacancy Interactions as the Origin of Room Temperature Ferromagnetism in (In(1-x)Fe(x))2O3.
abstract: Dilute magnetic semiconductors (DMSs) show great promise for applications in spin-based electronics, but in most cases continue to elude explanations of their magnetic behavior. Here, we combine quantitative x-ray spectroscopy and Anderson impurity model calculations to study ferromagnetic Fe-substituted In2O3 films, and we identify a subset of Fe atoms adjacent to oxygen vacancies in the crystal lattice which are responsible for the observed room temperature ferromagnetism. Using resonant inelastic x-ray scattering, we map out the near gap electronic structure and provide further support for this conclusion. Serving as a concrete verification of recent theoretical results and indirect experimental evidence, these results solidify the role of impurity-vacancy coupling in oxide-based DMSs.
authors.affiliation: Department of Physics & Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
authors.forename: R J
authors.initials: RJ
authors.lastname: Green
authors.affiliation: Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0X4, Canada.
authors.forename: T Z
authors.initials: TZ
authors.lastname: Regier
authors.affiliation: Department of Physics & Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
authors.forename: B
authors.initials: B
authors.lastname: Leedahl
authors.affiliation: Department of Physics & Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
authors.forename: J A
authors.initials: JA
authors.lastname: McLeod
authors.affiliation: School of Chemistry & Materials Science, Shanxi Normal University, Linfen 041004, People's Republic of China.
authors.forename: X H
authors.initials: XH
authors.lastname: Xu
authors.affiliation: Department of Physics & Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
authors.forename: G S
authors.initials: GS
authors.lastname: Chang
authors.affiliation: M. N. Mikheev Institute of Metal Physics of the Ural Branch of Russian Academy of Sciences, 620990 Yekaterinburg, Russia.|Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russia.
authors.forename: E Z
authors.initials: EZ
authors.lastname: Kurmaev
authors.affiliation: Department of Physics & Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Moewes