Effects of oxygen-reducing atmosphere annealing on LaMnO$_3$ epitaxial thin films

Journal of Physics D: Applied Physics Volume 42, Number 16, 165401 (2009) We investigated the effects of annealing on LaMnO$_3$ epitaxial thin films grown by pulsed laser deposition and propose an efficient method of characterizing their stoichiometry. Structural, magnetic, and optical properties co...

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Main Authors Choi, W S, Marton, Z, Jang, S Y, Moon, S J, Jeon, B C, Shin, J H, Seo, S S A, Noh, T W, Myung-Whun, K, Lee, H N, Lee, Y S
Format Journal Article
LanguageEnglish
Published 13.07.2009
Subjects
Physics - Strongly Correlated Electrons
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Summary:Journal of Physics D: Applied Physics Volume 42, Number 16, 165401 (2009) We investigated the effects of annealing on LaMnO$_3$ epitaxial thin films grown by pulsed laser deposition and propose an efficient method of characterizing their stoichiometry. Structural, magnetic, and optical properties coherently indicate non-stoichiometric ferromagnetic and semiconducting phases for as-grown LaMnO$_3$ films. By annealing in an oxygen-reducing atmosphere, we recovered the antiferromagnetic and insulating phases of bulk-like stoichiometric LaMnO$_3$. We show that non-destructive optical spectroscopy at room temperature is one of the most convenient tools for identifying the phases of LaMnO$_3$ films. Our results serve as a prerequisite in studying LaMnO$_3$ based heterostructures grown by pulsed laser deposition.
DOI:10.48550/arxiv.0907.2125