Conference Presentation (Invited)

FZJ-2024-03302

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning the physical properties of La0.7Sr0.3MnO(3-δ) via oxygen offstoichiometryusing assisted thermal vacuum annealing

Yin, C.FZJ* ; Cao, L. ; He, S.FZJ* ; Duchon, T. ; Zhou, Y. ; Sheptyakov, D. ; Fernandez-Diaz, M. T. ; Nandi, S. ; Petracic, O.FZJ*

2024

Abstract: In La0.7Sr0.3MnO(3-δ) (LSMO), the topotactic phase transition from the Perovskite(PV) phase to the layered oxygen-vacancy-ordered Brownmillerite (BM)phase can be triggered by deoxygenation. We realized this phase transition inboth a strained LSMO thin film system and bulk-like unstrained LSMO powdersystem via assisted thermal vacuum annealing. For thin film, A metal-toinsulatorand simultaneously a ferromagnetic-to-antiferromagnetic transitionis found. For powder, the evolution of crystal and spin structure at differentoxygen-deficient states from PV to BM is determined using neutron diffraction.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)
4. Elektronische Materialien (PGI-7)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)

Appears in the scientific report 2024

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