physica status solidi (a)
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Stefan Hildebrandt (Editor-in-Chief), Sabine Bahrs (Deputy Editor)
Online ISSN: 1862-6319
Microstructure of Sputtered CoFe2O4 Film
The paper by Junichi Echigoya , featured as Editor's Choice in this issue of phys. stat. sol. (a), reports structural investigations of CoFe2O4 films deposited by sputtering on MgO substrates at temperatures between 330 and 870 K. By means of X-ray and electron diffraction as well as detailed transmission electron microscopy (TEM) experiments it could be shown that Co precipitates in the Co ferrite matrix were formed. At a growth temperature of 670 K, elongated, filament-like inclusions with hcp structure were found. One of these filaments is shown in a high resolution plan-view TEM image reproduced on the cover of this issue. The anisotropic shape of the precipitatesis obviously caused by the misfit anisotropy of the Co structure in the ferrite lattice.