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MA: Fachverband Magnetismus

MA 39: Poster Magnetism II

MA 39.15: Poster

Mittwoch, 11. März 2026, 18:00–21:00, P2

Growth and magnetic characterization of freestanding single-crystalline SrRuO3 /La0.7Sr0.3MnO3 oxide bilayers — •Diana Rata, Lilly Patschinsky, Elin Vocks, Alexander Much, Oleksandr Dolynchuk, Antonia Rieche, and Kathrin Dörr — Institute of Physics, Martin Luther University Halle*Wittenberg, 06099 Halle, Germany

We report the successful fabrication of freestanding epitaxial SrRuO3 /La0.7Sr0.3MnO3 (SRO/LSMO) heterostructures. LSMO and SRO layers were first prepared by PLD on a water-soluble sacrificial oxide Sr3Al2O6 (SAO), which was epitaxially grown on a SrTiO3 (100) substrate, followed by selective release and transfer of the membranes onto SiO2 wafers. The structure was characterized by X-ray diffraction. Our findings reveal that the epitaxial growth and strain of SAO layer is strongly affected by the subsequent growth condition (e.g., oxygen partial pressure) of upper oxide layers and influences strongly the quality and integrity of the oxide membranes. Magnetic characterization show that the freestanding SRO/LSMO membranes retain the key magnetic signatures of their corresponding bilayers. Notably, in the case of freestanding single-layer SrRuO3, we observe an enhancement of the magnetic response compared to its epitaxial single layer, suggesting strain relaxation and reduced substrate clamping as important factors. These results highlight the potential of freestanding oxide membranes for flexible integration and for exploring strain-decoupled magnetic phenomena in functional single-crystalline freestanding oxide bilayers.

Keywords: Freestanding complex oxides; Sr3Al2O6; epitaxial strain; PLD growth; magnetization