Surface Structures of La0.8Sr0.2MnO3(001) Thin Films

Erik Rheinfrank

Institute of Applied Physics
TU Wien

Tuesday, 28th July 2022,16:30 s.t.

The talk will be given in a hybrid mode.

You can either attend in physical presence:
TU Wien, Institute of Applied Physics,
Wiedner Hauptstraße 8-10, 1040 Vienna
Yellow Tower “B”, Seminar Room DB 05 B (5th floor)

Or you can join via Zoom:

Please note: This is the second of two back-to-back talks. The given starting time is only approximate.

Surface Structures of La0.8Sr0.2MnO3(001) Thin Films

Lanthanum-strontium manganite (La0.8Sr0.2MnO3, LSMO) is a perovskite oxide used as a cathode material in solid oxide fuel cells. To gain deeper insights into the reaction mechanisms, it is important to understand the structure of the surface at the atomic scale. To this end, atomically flat single-crystalline LSMO thin films were grown on Nb-doped SrTiO3(001) substrates via pulsed laser deposition (PLD). The as-grown films were transferred in UHV from the PLD chamber to a surface science system. Studying the LSMO(001) surface by STM and LEED unveils various and unusual (cubic quasi-periodic) surface structures. They depend on the oxygen chemical potential upon annealing and termination of the surface (Mn or La/Sr).