Resume

• 2001

  University of Tennessee

  University of Saskatchewan

  - Developed Soft X-ray Fluorescence Spectrometer

  \n- Research on magnetic thin film systems using X-ray absorption/emission spectroscopy at Advanced Light Source

  Berkeley

  CA

  Postdoctoral Researcher

  Knoxville

  Tennessee Area

  University of Tennessee

  Seoul

  Korea

  Led the grant project on Development of magnetic-field-assisted ion implantor for next generation ultrahigh density data-storage system\"

  Postdoc and Research Professor

  Atomic-Scale Surface Science Research Center

• 2000

  Gap Soo

  Chang

  PNT Technology Inc.

  Atomic-Scale Surface Science Research Center

  Seoul

  Korea

  - Led new development project on ultrahigh density perpendicular magnetic recording\n- Developed new ion-treatment equipment for magnetic anisotropy control

  Chief Technical Officer

  PNT Technology Inc.

  Saskatchewan

  Canada

  Teaching and Research

  Leading the Advanced Materials/Devices Research Laboratory (AMDR Lab).

  Professor in Physics and Engineering Physics

  University of Saskatchewan

  President

  Association of Korean-Canadian Scientists and Engineers (AKCSE)

• 1994

  Canadian Association of Physicists

  English

  Korean

  Ph.D.

  Applied Physics

  Yonsei University

• 1992

  M.Sc.

  Surface Science

  Yonsei University

• 1988

  B.Sc.

  Physics

  Yonsei University

• Physical Chemistry

  Research

  Thin Films

  Science

  Materials Science

  Optics

  Characterization

  Physics

  University Teaching

  Raman

  Nanotechnology

  Scanning Electron Microscopy

  Spectroscopy

  Powder X-ray Diffraction

  Quantum Chemistry

  Semiconductors

  Teaching

  LaTeX

  Magnetics

  Data Analysis

  Reduction of conductivity and ferromagnetism induced by Ag doping in ZnO: Co

  A. Moewes

  L. D. Finkelstein

  E. Z. Kurmaev

  D. W. Boukhvalov

  V. Pierron-Bohnes

  Guy Schmerber

  Silviu Colis

  H. Bieber

  Cobalt and silver co-doping has been undertaken in ZnO thin films grown by pulsed laser deposition in order to investigate the ferromagnetic properties in ZnO-based diluted magnetic materials and to understand the eventual relation between ferromagnetism and charge carriers. Hall transport measurements reveal that Ag doping up to 5% leads to a progressive compensation of the native n-type carriers. The magnetization curves show ferromagnetic contributions for all samples at both 5 K and room temperature

  decreasing with increasing the Ag concentration. First principles modeling of the possible configurations of Co–Ag defects suggests the formation of nano-clusters around interstitial Co impurity as the origin of the ferromagnetism. The Ag co-doping results in a decrease of the total spin of these clusters and of the Curie temperature.

  Reduction of conductivity and ferromagnetism induced by Ag doping in ZnO: Co