Abstract
Zn 0.92Co 0.08O thin films were fabricated on p-type Si (100) and quartz substrates by pulsed laser deposition using a ZnCoO ceramic target. The structural and magnetic properties of the films were characterized by field emission scan electronic microscopy, x-ray diffraction, x-ray photoemission spectroscopy, UV-visible transmission spectra, extended x-ray absorption fine structure spectroscopy and physical property measurement system. Substitutional doping of Co 2+ in ZnO lattice is demonstrated in the films. The as-deposited Zn 0.92Co 0.08O thin film displayed intrinsic room temperature ferromagnetism with saturation magnetization (M s) of ~ 0.20μ B/Co. The corresponding M s increased to ~ 0.23μ B/Co when annealed in vacuum and further to ~ 0.42μ B/Co after annealed in hydrogen. In turn, the M s dropped to the value of ~ 0.13μ B/Co after annealed in oxygen. Our studies indicate that oxygen vacancy density plays a key role in mediating the ferromagnetism of the diluted magnetic semiconductor films.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
