Thin (111) oriented CoFe2O4 and Co3O4 films prepared by decomposition of layered cobaltates

0458373 - ÚACH 2017 RIV NL eng J - Journal Article
Buršík, Josef - Soroka, Miroslav - Uhrecký, Róbert - Kužel, R. - Mika, Filip - Huber, Š.
Thin (111) oriented CoFe2O4 and Co3O4 films prepared by decomposition of layered cobaltates.
Applied Surface Science. Roč. 376, JUL (2016), s. 209-218. ISSN 0169-4332. E-ISSN 1873-5584
R&D Projects: GA ČR(CZ) GA14-18392S; GA ČR GA13-03708S
Institutional support: RVO:61388980 ; RVO:68081731
Keywords : Layered cobaltates * Spinels * Chemical solution deposition * Thin films * Oriented growth
Subject RIV: CA - Inorganic Chemistry; JD - Computer Applications, Robotics (UPT-D)
Impact factor: 3.387, year: 2016

The formation and structural characterization of highly (111)-oriented Co3O4 and CoFe2O4 films prepared by a novel procedure from 001-oriented NaCoO2 and Na(CoFe)O-2 is reported. The Na(CoFe)O-2 films were deposited on MgO, SrTiO3, LaAlO3, and Zr(Y)O-2 single crystals with (100) and (111) orientations by chemical solution deposition method and crystallized at 700 degrees C. Subsequently they were transformed into (111)-oriented spinel phase during post-growth annealing at 800-1000 degrees C. Morphology and structure of the films was investigated by means of scanning electron microscopy and X-ray diffraction. While all spinel films exhibit pronounced out-of-plane orientation irrespective of substrate, the rate of in-plane orientation strongly depend on lattice misfit values. Different epitaxial phenomena ranging from true one-to-one epitaxy to the existence of many-to-one epitaxy involving two or more orientations were determined by full 3D texture analysis.
Permanent Link: http://hdl.handle.net/11104/0258674