Speaker
Rostyslav Serha
(University of Vienna, Faculty of Physics)
Description
It is known that YIG films on GGG substrates worsen their magnetic properties important for magnonics at low temperatures. We present experimental results, simulations, and an analytical theory to clarify the influence of the GGG substrate on a 97 nm-thick YIG film at ultralow temperatures. At low temperatures, the paramagnetic GGG substrate can be magnetized by an external magnetic field. The GGG magnetization creates a stray field in the YIG film that affects its magnetization dynamics. In the case of in-plane magnetization of YIG/GGG the FMR frequency is shifted to lower values. Simultaneously, the magnetic damping of YIG increases by more than eight times compared to measurements at room temperature.
Author
Rostyslav Serha
(University of Vienna, Faculty of Physics)
Co-authors
Andrey Voronov
(University of Vienna, Faculty of Physics, Boltzmanngasse 5, Vienna, Austria.)
David Schmoll
(University of Vienna, Faculty of Physics)
Roman Verba
(Institute of Magnetism, Kyiv)
Sabri Koraltan
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Kristýna Davídková
(CEITEC BUT, Brno University of Technology, Brno, Czech Republic)
Barbora Budinská
(University of Vienna)
Qi Wang
(Huazhong University of Science and Technology)
Prof.
Oleksandr Dobrovolskiy
(University of Vienna)
Michal Urbánek
(CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno, Czech Republic.)
Morris Lindner
(INNOVENT e.V. Technologieentwicklung)
Timmy Reimann
(INNOVENT e. V. Technologieentwicklung, Prüssingstraße 27 B, Jena, Germany.)
Carsten Dubs
(INNOVENT e. V. Technologieentwicklung, Prüssingstraße 27 B, Jena, Germany.)
Claas Abert
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Dieter Suess
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Sebastian Knauer
(University of Vienna, Faculty of Physics, Boltzmanngasse 5, Vienna, Austria.)
Andrii Chumak
(University of Vienna, Faculty of Physics, Boltzmanngasse 5, Vienna, Austria.)
