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MA: Fachverband Magnetismus
MA 39: Magnetic Thin Films
MA 39.3: Vortrag
Donnerstag, 20. März 2025, 15:45–16:00, H19
Structural, magnetic and electrical properties of oxygen-deficient La0.6Sr0.4CoO3−δ thin films — Suqin He1,2,3, •Oleg Petracic1, Valeria Lauter4, Lei Cao1,5, Yunxia Zhou5, Moritz Weber2,3, Jürgen Schubert6, Omar Concepción6, Regina Dittmann2,3, Rainer Waser2,3, Thomas Brückel1,3, and Felix Gunkel2,3 — 1JCNS-2, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany — 2PGI-7, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany — 3JARA-FIT, RWTH Aachen University, 52056 Aachen, Germany — 4Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA — 5Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 6PGI-9, Forschungszentrum Juelich GmbH, 52425 Juelich, Germany
In La0.6Sr0.4CoO3−δ (LSCO) the gradual oxygen release triggers a phase transition from the initial ferromagnetic perovskite to an oxygen vacancy layered antiferromagnetic brownmillerite structure. We have studied LSCO thin films fabricated by pulsed laser deposition. In situ x-ray diffraction and polarized neutron diffraction reveals the topotactic phase transition of the LSCO thin films, which can be attributed to the release of oxygen and ultimately the transition to a coherently ordered BM phase. By comparing the magnetic and electronic properties of the sample at different oxygen deficient states, we demonstrate that the magnetic and electronic transitions are apart from the structural phase transition. S. He, O. Petracic, V. Lauter, L. Cao, Y. Zhou, M. L. Weber, J. Schubert, O. Concepción, R. Dittmann, R. Waser, T. Brückel, F. Gunkel, Adv. Funct. Mater. 2024, 34, 2313208.
Keywords: complex oxides; perovskites; LSCO; polarized neutron scattering; metal insulator transition