Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 8: Multiferroics and magnetoelectrics I (joint session MA/KFM)
KFM 8.3: Vortrag
Dienstag, 13. März 2018, 10:00–10:15, EB 202
Exotic magnetoelectric excitations of the multiferroic SmFe3(BO3)4 — •Dávid Szaller1, Artem M. Kuz'menko2, Alexander A. Mukhin2, Toomas Rõõm3, Urmas Nagel3, Thomas Kain1, Vlad Dziom1, Lukas Weymann1, Alexey Shuvaev1, Anna Pimenov1, Vsevolod Yu. Ivanov2, Irina A. Gudim4, Leonard N. Bezmaternykh4, and Andrei Pimenov1 — 1Institute of Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria — 2Prokhorov General Physics Institute, Russian Academy of Sciences, 119991 Moscow, Russia — 3National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia — 4L. V. Kirensky Institute of Physics Siberian Branch of RAS, 660036 Krasnoyarsk, Russia
Magnetoelectric(ME) multiferroics(MFs), i.e. materials simultaneously hosting ferroelectric and magnetic order, have been attracting enormous interest due to their potential in information-technology applications. Rare-earth ferroborates are a particularly interesting familiy of MF crystals, where the strong spin-orbit interaction at the rare-earth sites results in the coupling of the magnetic and electric degrees of freedom while the ME response is enhanced by the antiferromagnetic ordering of the iron spins. The ME coupling appears in the optical regime as different absorption of counter-propagating light beams, where transparent and dark directions can be swapped by reversing the magnetic field. Furthermore, due to the ME coupling the strength of absorption at spin-wave resonance frequencies can also be tuned by electric field, opening the path for practical applications.