SKM 2023 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 14: Thin Oxides and Oxide Layers
DS 14.1: Vortrag
Donnerstag, 30. März 2023, 09:30–09:45, SCH A 315
Strain effects of the electronic and magnetic properties of thulium iron garnet films — •Sibylle Gemming1, Georgeta Salvan1, Apoorva Sharma1, Oana T. Ciubotariu2, and Manfred Albrecht2 — 1Institute of Physics, TU Chemnitz — 2Institute of Physics, U Augsburg.
Rare earth iron garnets are magnetic insulators, in which two structurally distinct iron centers form sublattices, which couple antiferromagnetically. The overall magnetization of the compounds results from the alignment of the local magnetic moments of the 4f electrons at the rare earth sites and is sensitive to external effects such as temperature and strain. We performed gradient-corrected density-functional calculations including spin-orbit and correlation corrections to study the property-thickness relation of thin thulium iron garnet films that had been grown epitaxially under tensile strain on a doped gallium gadolinium garnet substrate. We could rationalize the observed growth modes for different film thicknesses with strain arguments and correlate it with the observed electronic properties (Funding: DFG, GE 1202/12-1)