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Control of High Quality SrVO 3 Electrode in Oxidizing Atmosphere
Author(s) -
Bérini Bruno,
Demange Valérie,
Bouttemy Muriel,
Popova Elena,
Keller Niels,
Dumont Yves,
Fouchet Arnaud
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600274
Subject(s) - materials science , oxidizing agent , heterojunction , thermal stability , partial pressure , electrode , nanostructure , stoichiometry , oxygen , pulsed laser deposition , deposition (geology) , analytical chemistry (journal) , nanotechnology , thin film , chemical engineering , optoelectronics , chemistry , organic chemistry , paleontology , chromatography , sediment , engineering , biology
SrVO 3 (SVO) is a model system for strongly correlated oxides and is highly promising as conductive layer in heterostructures. Therefore, the control of electronic properties and morphology are essential for the advanced applications. Here, the oxygen stability during and after the deposition is explored, as SVO film is expected to undergo different postdeposition thermal and atmosphere treatments during its integration in a heterostructure. Hence, the influence of oxygen stability on morphology and electrical properties of the metallic SrVO 3 grown by pulsed laser deposition has been investigated. Films grown under vacuum (SrVO 3− δ ) exhibit a very smooth surface while films grown under higher oxygen pressure roughen and present nanostructures at the surface. These nanostructures are found to be of Sr 3 V 2 O 8 phase and their apparition can be controlled by the oxygen supply. Subsequent thermal treatments at different temperatures under same oxygen pressure prevent formation of the Sr 3 V 2 O 8 phase, lead to the stoichiometric SrVO 3 , and thus improve the transport properties. In this study is shown the extreme sensitivity of SVO to oxygen and the conditions to obtain high quality smooth SVO films with improved electrical properties for electrode application.