Abstract
Epitaxial ZnO:Co films with room-temperature ferromagnetism have been hydrothermally grown in water at 90°C using a ZnO seed layer on MgAl2O4 (111) substrates. The ZnO:Co films are single crystalline with out-of-plane orientations of ZnO:Co⟨001⟩∥MgAl2O4⟨111⟩ and in-plane orientations of ZnO:Co[110]∥MgAl2O4[1¯1¯2] and ZnO:Co[1¯10]∥MgAl2O4[1¯10] in spite of numerous threading dislocations at the boundaries of crystal mosaic. Saturation magnetizations of 0.83, 0.77, and 0.08emu∕cm3 and coercivities of 40, 22, and 22Oe were obtained for the epitaxial Zn1−xCoxO (x=0.02, 0.05, and 0.10) films, respectively, at room temperature. Hydrogen unintentionally incorporated in the hydrothermal synthesis may contribute to the ferromagnetic properties in ZnO:Co by enhancing carrier concentration as a shallow donor.
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.
