Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids

Autor(en)

Oleksandr Dobrovolskiy, Andrii Chumak

Abstrakt

Ferromagnet/superconductor heterostructures allow for the combination of unique physical phenomena offered by the both fields of magnetism and superconductivity. It was shown recently that spin waves can be efficiently scattered in such structures by a lattice of static or moving magnetic flux quanta (Abrikosov vortices), resulting in bandgaps in the spin-wave spectra. Here, we realize a nonreciprocal motion of a vortex lattice in nanoengineered symmetric and asymmetric pinning landscapes and investigate the non-reciprocal scattering of magnons on fluxons. We demonstrate that the magnon bandgap frequencies can be tuned by the application of a low-dissipative transport current and by its polarity reversal. Furthermore, we exploit the rectifying (vortex diode or ratchet) effect by the application of a 100 MHz-frequency ac current to deliberately realize bandgap up- or downshifts during one ac halfwave while keeping the bandgap frequency constant during the other ac halfwave. The investigated phenomena allow for the realization of energy-efficient hybrid magnonic devices, such as microwave filters with an ultra-high bandgap tunability of 10 GHz/mA and a fast modulation of the transmission characteristics on the 10 ns time scale.

Organisation(en)

Nanomagnetismus und Magnonik

Journal

Journal of Magnetism and Magnetic Materials

Band

543

Anzahl der Seiten

6

ISSN

0304-8853

DOI

https://doi.org/10.1016/j.jmmm.2021.168633

Publikationsdatum

02-2022

Peer-reviewed

Ja

ÖFOS 2012

103033 Supraleitung, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f41238bb-9f99-43b8-b86b-9a803d8a6d9f