SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.66: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Epitaxial Growth of Magnetic Oxides and their magnetic Coupling — •Akashdeep Akashdeep1, Sven Becker1, Mathias Kläui1,2, and Gerhard Jakob1,2 — 1Institute of Physics, Johannes Gutenberg-University Mainz, Staudingerweg 7, Mainz 55128, Germany — 2Graduate School of Excellence *Materials Science in Mainz* (MAINZ), Staudingerweg 9, Mainz 55128, Germany
Due to its exceptionally low damping, ferrimagnetic Y3Fe5O12 Y3Fe5O12 (YIG) is the prototypical material for studying magnonic properties. By substituting the non-magnetic yttrium with the temperature-dependent magnetic moment of gadolinium, we can introduce an additional spin degree of freedom in the form of a magnetic compensation point. Here, we grow epitaxial RuO2 films and Y3Fe5O12/Gd3Fe5O12 (YIG/GIG) by pulsed laser deposition and study the magnetic coupling in the heterostructures. The XRD patterns show Laue oscillations and a narrow rocking curve, indicating a smooth surface and interface. From bulk-sensitive magnetometry and surface-sensitive spin Hall magnetoresistance measurements, we can control the heterostructures' magnetic properties by tuning the thickness of the individual layers. These bilayer devices could potentially control the magnon transport analogously to electron transport in giant magnetoresistive devices [1]. The RuO2 is tested for the novel altermagnetism effects[2].
[1] H. Wu et.al.; Phys. Rev. Lett. 120, 097205 (2018) [2] L. Šmejkal et al.; Sci. Adv. 6, 23 (2020)