Lattice distortion of holmium doped bismuth ferrite nanofilms

Single-phase multiferroic BiFeO3 and rare-earth metal of holmium (Ho) doped BiFeO3 nanofilms were prepared on Pt (100)/Ti/SiO2/Si wafer via solution-gelation technique. It was suggested that the lattice distortion happened with the lattice parameter of d decreasing after doping rare-earth metal of Ho. Meanwhile, the structure of nanofilms transformed from hexahedron phase to tetragonal phase after doping Ho. The analysis on X-ray photoelectron spectroscopy (XPS) indicated that the ratio of Fe3+ cations to Fe2+ cations increased with the increase of binding energy between Fe and O and decrease of that between Bi and O after doping Ho. The present work provided an available way on enhancing multiferroic of BiFeO3 nanofilms.

Graphical AbstractXRD patterns of the typical pure BiFeO3 and Ho doped BiFeO3 nanofilm (a), expanded view XRD patterns around 20° to 33° (b), expanded view XRD patterns around 43° to 60° (c) and expanded view XRD patterns around characteristic peak of wafer (d)Figure optionsDownload as PowerPoint slide