Speaker
Dr
Khrystyna Levchenko
(NanoMag research group, Faculty of Physics, University of Vienna (Austria))
Description
To facilitate magnonics technology, the delay time in nanostructures should be improved. Hence, single-crystalline sub-100 nm thick films of Ga:YIG and reference YIG were fabricated and characterised via VSM, FMR and BLS. Ga:YIG demonstrates a perpendicular magnetic anisotropy, reduced magnetisation, good Gilbert damping, and an enhanced exchange stiffness, which results in improved (~ 3.4 times) group velocities for k > 30 rad/μm. The spin waves soon (from k ≈ 4 rad/μm) start to exhibit an exchange nature and their dispersion is more isotropic compared to pure YIG. Therefore, Ga:YIG opens access to the operation with fast isotropic exchange spin waves in future magnonic applications.
Author
Dr
Khrystyna Levchenko
(NanoMag research group, Faculty of Physics, University of Vienna (Austria))
Co-authors
Dr
Tobias Böttcher
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern (Germany); MAINZ Graduate School of Excellence, Mainz (Germany))
Mr
Moritz Ruhwedel
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern (Germany))
Prof.
Qi Wang
(NanoMag research group, Faculty of Physics, University of Vienna (Austria); Huazhong University of Science and Technology (China))
Dr
Hryhorii Chumak
(Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv (Ukraine))
Dr
Maksym Popov
(Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv (Ukraine))
Prof.
Igor Zavislyak
(Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv (Ukraine))
Dr
Carsten Dubs
(INNOVENT e.V. Technologieentwicklung, Jena (Germany))
Dr
Oleksii Surzhenko
(INNOVENT e.V. Technologieentwicklung, Jena (Germany))
Prof.
Burkard Hillebrands
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern (Germany))
Prof.
Andrii Chumak
(NanoMag research group, Faculty of Physics, University of Vienna (Austria))
Prof.
Philipp Pirro
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern (Germany))
