Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.1: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Magnetic Coupling in Y3Fe5O12/Gd3Fe5O12 Heterostructures — Sven Becker1, Zengyao Ren1,2,3, •Akashdeep Akashdeep1, 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 — 3School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Ferrimagnetic Y3Fe5O12 (YIG) is the prototypical material for studying magnonic properties due to its exceptionally low damping. By substituting the yttrium with the temperature-dependent magnetic moment of gadolinium, we can introduce an additional spin degree of freedom in form of a magnetic compensation point. Here, we study the magnetic coupling in epitaxial Y3Fe5O12/Gd3Fe5O12 (YIG/GIG) heterostructures grown by pulsed laser deposition. The XRD patterns show Laue oscillations and a narrow rocking curve indicating a smooth surface and interface. From bulk sensitive magnetometry and surfacesensitive spin Seebeck effect and spin Hall magnetoresistance measurements, we determine the alignment of the heterostructure magnetization as a function of temperature and external magnetic field. We show that we can control the magnetic properties of the heterostructures 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].
[1] H. Wu et.al.; Phys. Rev. Lett. 120, 097205 (2018).