Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Thin Films: Coupling Effects and Exchange Bias
MA 22.9: Vortrag
Mittwoch, 20. März 2024, 12:00–12:15, H 2013
Investigation of proximity effects in YBa2Cu3O7−x/SrRuO3 and SrRuO3/YBa2Cu3O7−x heterostructures — •Vitor de Oliveira Lima1,2, Michael Faley1, Omar Concepcion1, Connie Bednarski-Meinke1, Mai H. Hamed1, Emmanuel Kentzinger1, Shibrabata Nandi1,2, and Thomas Brückel1,2 — 1Forschungszentrum Jülich GmbH, Jülich, Germany — 2RWTH Aachen, Lehrstuhl für Experimentalphysik IVc, Jülich-Aachen Research Alliance (JARA-FIT), Aachen, Germany
Heterostructures (HS) based on superconductors and ferromagnets exhibit strong potential for innovating devices in spintronics and quantum computing applications. SrRuO3 (SRO) has attracted much attention among transition metal oxides for being the only 4d oxide to show itinerant ferromagnetism and metallic conductivity. On the other side, YBa2Cu3O7−x (YBCO) is one of the most studied high Tc superconductors with a large variety of applications. We report structural, morphological, magnetic and magnetotransport characterization of YBCO/SRO (S1) and SRO/YBCO (S2) HS prepared on low miscut SrTiO3 (001) single crystals by high oxygen pressure sputtering. The HS exhibit epitaxial growth with good crystal quality and sharp interfaces, with critical temperatures of 87.5 K and 57 K for S1 and S2, respectively, both reduced in relation to YBCO (91 K). We observe an inversion of the magnetoresistance peak around the onset of superconductivity, a robust indicator of proximity effects at both interfaces. The nature of the proximity effect will be discussed.
Keywords: YBCO; SrRuO3; Heterostructures; Proximity effects; Magnetotransport