Year-end Sale % OFF 
Abstract
Zn1−xCoxO samples were prepared by a standard solid-state reaction method.Zn1−xCoxO crystals in the wurtzite structure were obtained with a Co composition of up to 22.1%. Thea- andc-axis lengths increased and decreased, respectively, with an increase inCo composition. Raman spectra showed systematic broadening of theE2 (high) phonon mode associated with the increase in Co composition, and electronictransitions of Co in the oxygen tetrahedron were observed in optical absorptionmeasurement. These results indicated systematic substitution of Co into the Zn sites.Furthermore, an additional broad absorption band at 2.4–3.3 eV corresponding to thecharge transfer (CT) process was also observed. The Raman spectra showed strong enhancement of the LOphonon due to a resonant Raman process induced with the coupling of the LOphonon and a photo-excited carriers mediated CT gap. These results suggest thepossibility of carrier-induced ferromagnetism based on double exchange interaction inZn1−xCoxO by visible light irradiation.
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.
