Oriented growth of Fe3O4thin film on crystalline and amorphous substrates by pulsed laser deposition
Year: 2007
Type: article
Abstract: We have deposited magnetite thin films using the pulsed laser deposition technique from a α-Fe 2 O 3 target on different substrates (Si (1 1 1), GaAs (1 0 0), Al 2 O 3 (0 0 1) and amorphous float glass (FG)) without any buffer layer at a substrate temperature of 450 °C. These films have been characterized by x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), Raman spectroscopy, ac magnetic susceptibility and four-probe resistivity. The XRD results of these films show highly (1 1 1) oriented growth and single phase nature of Fe 3 O 4 films on all substrates. Fe 2p core level x-ray photoelectron spectra and Raman spectra reveal the formation of Fe 3 O 4 throughout the thickness of the films. All films show a Verwey transition at or around 120 K. It is observed that the oriented growth of Fe 3 O 4 films takes place along the [1 1 1] direction on these substrates, which have either a huge lattice mismatch or no matching at all (as in FG) with Fe 3 O 4 .
Institution: UGC DAE Consortium for Scientific Research
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2028343135