Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 31: Magnonics I
MA 31.9: Vortrag
Mittwoch, 14. März 2018, 17:30–17:45, H 0110
Tailoring spin-wave eigenfrequencies in Py films with Co-Fe-FEBID nanodisks embedded into square antidot lattices — •Oleksandr V. Dobrovolskiy1,2, Roland Sachser1, Sergey A. Bunyaev3, Gleb N. Kakazei3, Felix Stobiecki4, Janusz Dubowik4, Piotr Kuswik4, Maciej Krawczyk5, Michael Huth1, and Ruslan V. Vovk2 — 1Goethe University, Frankfurt am Main, Germany — 2V. Karazin National University, Kharkiv, Ukraine — 3IFIMUP-IN Universidade do Porto, Porto, Portugal — 4IMP Polish Academy of Sciences, Poznań, Poland — 5Adam Mickiewicz University in Poznań, Poznań, Poland
The spin-wave eigenfrequencies in 30 nm-thick Py films with Co-Fe nanodisks of different heights embedded in antidots were studied by VNA-FMR spectroscopy in the 10 K to 300 K temperature range and compared with a reference plain Py film. The antidots with 200 nm in diameter were milled by Ga focused ion beam and formed a square lattice with a period of 600 nm. The Co-Fe nanodisks were deposited inside of the antidots by focused electron beam induced deposition (FEBID). The external field H was applied along the edge of the unit cell of the bicomponent magnonic crystal thus formed. In the Py sample with antidots, in addition to the FMR mode of the plain film, modes resulting from the nanopatterning have been observed. In the Py/Co-Fe-FEBID sample, further modes depending on H and the antidot volume fraction filled with Co-Fe-FEBID have been revealed. The role of the Co-Fe-FEBID disks in the broadening of the FMR linewidth is discussed.