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Regensburg 2016 – scientific programme

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.40: Poster

Tuesday, March 8, 2016, 09:30–12:30, Poster B1

High-TC Interfacial Magnetism in (LaMnO3)2n/(SrMnO3)n and (La2CoMnO6)2n/(SrMnO3)n Superlattices — •Marius Keunecke1, Sven Esser1, Danny Schwarzbach1, Markus Jungbauer1, Sebastian Hühn1, Vasily Moshnyaga1, Ricardo Egoavil2, Gustaf Van Tendeloo2, Nicolas Gauquelin2, Johan Verbeeck2, Kerry O’Shea3, and Donald MacLaren31I. Physikalisches Institut Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany — 2EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium — 3Scottish Universities Physics Alliance, School of Physics and Astronomy, University of Glasgow, Glasgow, Glasgow G12 8QQ, UK

Superlattices of (LaMnO3)2n/(SrMnO3)n (LMO/SMO, n=6) and (La2CoMnO6)2n/(SrMnO3)n (LCMO/SMO, n=5) on SrTiO3 (001) were prepared by a metalorganic aerosol deposition technique (MAD). A high structural quality of samples was evidenced by XRD, XRR and TEM. SQUID magnetization measurements for the LMO/SMO SLs clearly show two ferromagnetic (FM) phases with TC1≈ 230K and TC2=358K. The low-temperature phase is likely located in the LMO layers. The high-temperature FM phase might originate from the LMO/SMO interface due to the electron transfer across the interface. No high-TC phase and no interfacial charge transfer was found in LCMO/SMO. By introducing a LMO buffer layer with sufficient thickness (6 ML) between both interfaces the high temperature interfacial FM phase can be restored. Financial support of the EU FP7 (Project *IFOX*) and SFB 1073 (TPB04) is acknowledged.

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