Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.40: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

High-T_C 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 MacLaren³ — ¹I. 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 T_C1≈ 230K and T_C2=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-T_C 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.