Enhanced high-temperature electronic transport properties in nanostructured epitaxial thin films of the La<inf>n+1</inf>Ni<inf>n</inf>O<inf>3n+1</inf> Ruddlesden-Popper series (n = 1, 2, 3, ∞)

Mónica Burriel, Gemma Garcia, Marta D. Rossell, Albert Figueras, Gustaaf Van Tendeloo, José Santiso

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Epitaxial thin films of lanthanum nickel oxide Ruddlesden-Popper series (Lan+1NinO3n+1) have been prepared on different single-crystal substrates by metal organic chemical vapor deposition. Varying the La/Ni composition ratio in the precursor solution allows deposition of films with controlled La/Ni stoichiometry ranging between 1 and 2. Epitaxial La 2NiO4 (n = 1) and LaNiO3 (n = ∞) pure phases were obtained for La/Ni close to 2 and 1, respectively. For intermediate La/Ni composition, films with a microstructure consisting of a disordered stacking of nanodomains with progressively increasing average n value were obtained. Similarly with bulk samples, the electronic conductivity of the nanostructured films increases with the measured average n value, opening the possibility to prepare new mixed ionic and electronic conducting nanocomposite thin films with tailored properties © 2007 American Chemical Society.
Original languageEnglish
Pages (from-to)4056-4062
JournalChemistry of Materials
Volume19
Issue number16
DOIs
Publication statusPublished - 7 Aug 2007

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