Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 13: Magnonics 1

MA 13.4: Vortrag

Dienstag, 6. September 2022, 10:15–10:30, H43

Magnons in antiferromagnets: tools for transport and processing of information — •Olena Gomonay — 1Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany

Magnonics as a concept of information processing with magnon spins is a promising alternative to spintronics, which manipulates electron-mediated spin currents. Magnons in antiferromagnets have further advantages of high limiting velocities and long propagation length compared to their ferromagnetic counterparts. Moreover, magnon currents in antiferromagnets, in contrast to ferromagnets, can carry both spin orientations and thus can be used for manipulation of the magnetic states. In my talk I discuss different aspects of magnon-mediated transport in antiferromagnets and possible applications to information processing. I compare two mechanisms of the nonlocal spin transport observed in easy-plane and easy-axis antiferromagnets via spin-polarised eigenmodes and via magnon birefringence. Magnon birefringence effect can be also observed in the multidomain antiferromagnets with the pronounced magnetostriction. Interaction of magnons in such a case results in a paramagnetic downconversion and resonance excitation of different magnon modes. I show further how the spin-polarised magnons can be used for manipulation of the magnetic states in multilayered films.