Vanadium transition metal oxide films obtained by annealing under room atmosphere of metal layers sequentially deposited

• Published in: Journal of crystal growth Vol. 208; no. 1; pp. 471 - 481
• Main Authors: Baba Ali, E, Bernède, J.C, Le Ray, P
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2000; Elsevier
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrode battery; Exact sciences and technology; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Post-annealing; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Transition metal oxide film; Vacuum deposition; Electrode battery; 68.55.−a; Post-annealing; 81.15.Ef; Transition metal oxide film; Inorganic compounds; Transition element compounds; Controlled atmospheres; Secondary cells; Crystal growth from vapors; Experimental study; Iron Vanadates; Thin films; Multilayers; Chemical composition; Nickel Divanadates; Pretreatment; Diffusion; Microstructure; Thermal annealing; Vacuum deposition; Electron beam evaporation; Concentration distribution
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/S0022-0248(99)00404-2

Metallic thin films M/V/M/V... /V/M (M=Fe,
Ni) sequentially deposited under vacuum were annealed for
1
2
h in room atmosphere. The samples were characterised by X-rays diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and optical absorption (OA) and near-infrared absorption. The annealing temperature and the substrate were taken as parameters. In addition some pre-annealing treatment was used. The results showed that monoclinic Ni
2V
2O
7 and triclinic FeVO
4, homogeneous thin films can be synthesised by this simple technique. Best results were obtained when the glass substrate used was coated with SnO
2 thin films. The results were improved when, before air-annealing, a first annealing under vacuum was proceeded in order to homogenise the metal distribution in the sample.