Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.60: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Synthesis and Characterization of La2−2xSr1+2xMn2O7 thin films — •Florian Hollemann, Marius Keunecke, Vladimir Roddatis, Daniel Steil, Stefan Mathias, and Vasily Moshnyaga — Georg-August-Universität Göttingen
Perovskite oxides are an intriguing material system showing effects like superconductivity, CMR, metal-insulator transitions. These effects are related to the strong interaction between charge, spin, orbit and lattice degrees of freedom. Because of the inherent 2D structure the layered manganite La2−2xSr1+2xMn2O7 is attractive as a model system for low-dimensional physics and can serve as a playground to study these interactions. We fabricated Ruddlesden-Popper phase (n=2) La2−2xSr1+2xMn2O7 thin films on LSAT(001) substrates using metalorganic aerosol deposition (MAD), with and without atomic layer epitaxy (ALE). For bulk systems the phase diagram is well known, but for thin films it is not yet completely reported. Our aim is to develop a thin film phase diagram by varying the doping x and characterising the electrical and magnetic behavior by using SQUID and PPMS. The structural quality and phase purity was checked using the in-situ-ellipsometry, XRR, XRD, AFM and TEM.