Abstract
We systematically investigate the unoccupied electronic states, crystal structure, and magnetism of V- and Mn-doped ZnO nanocrystals (NCs). Post-annealing treatment at 300 °C converts diamagnetic V5+ into magnetic high-spin V3+ ions, which leads to room-temperature ferromagnetism for the V-doped NCs. In contrast, ferromagnetism does not occur for the Mn-doped NCs. Oxygen 1s x-ray absorption spectroscopy reveals that the unoccupied metal-oxygen hybridized state lies near the bottom of the conduction band for the V-doped NCs but lies far above it for the Mn-doped NCs. Therefore, the ferromagnetism in a ZnO-based diluted magnetic semiconductor system can be understood within the framework of the n-type carrier-mediated ferromagnetism model.
Sign-in/Register to access full text options 
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.
