Abstract
Among the ferromagnetic II–VI semiconductors, the (Zn,TM)O diluted magnetic semiconductors (DMSs) is the most promising for application in spintronic, since the high Curie temperature. In this work, the structural, electronic and magnetic properties of pristine armchair (5,5) and zigzag (5,0) ZnO nanotubes (ZnONTs) and doped with a single and a pair 3d transition metals (TMs) were studied based on density functional theory (DFT) method. Moreover a single TM encapsulated inside twice unit cell of (5,5) ZnONT are systematically investigated. The both doped and encapsulated systems are found exceptionally stable and their formation is exothermic. It is revealed that the TM magnetic moment increases first and then decreases, and reaches the maximum value when Mn is doped into ZnONTs. The values of magnetic moment and their variation trend versus the atomic number are similar for 3d TM-doped (5,0) and (5,5) ZnONTs, indicating they are independent of the chirality of tubes. Additionally, the Fe-doped (5,5) and Cu@(5,5) ZnONT with half-metal and thus 100% spin polarization characters seem to be good candidates for spintronic applications. Our research can provide guidance for the experiment upon DMSs and systemic investigation in 3d TMs. We suggest that ZnONTs especially armchair type, doped by TMs would have application potential as a spin polarized electron source for spintronic devices in the future.
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.
