Abstract:
The nickel and iron co-doped with zinc oxide Zn1-x-yFexNiyO {(x=0, y=0), (x=0.05, y=0), (x=0, y=0.05), (x=0.03, y=0.02)} diluted magnetic semiconductor were successfully prepared by Sol-Gel technique. Pure and doped samples were characterized by X-ray diffraction, UV-visible spectroscopy, Vibrating Sample Magnetometer, and Fourier Transform Infrared Spectroscopy. The X-ray analysis of pure and doped ZnO confirmed the hexagonal wurtzite structure and no other phase like secondary and impurity. The UV-visible absorption spectra of Co-doped samples showed a blue shift in absorption edge as compared to un-doped or single-doped ZnO nanoparticles. The magnetic characterization confirms the room temperature ferromagnetism in all doped and co-doped ZnO nanoparticles. Magnetic saturation was improved in Fe-Ni Co-doped samples relative to pure or single doped with ZnO which reveals that the exchange interaction between Ni and Fe leads over the Ni-Ni and Fe-Fe ion interactions. The Fourier Transform Infrared Spectroscopy (FTIR) reveals the existence of chemical bonding and functional groups. It was confirmed that the occurrence of iron Fe and Ni modes is associated with the ZnO nanoparticles.
Keywords:
Xray Diffraction
,
Fe codoped ZnO
,
Room Temperature Ferromagnetism
,
Diluted Magnetic Semiconductors