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Magnons in the Multiferroic Phase of Cupric Oxide
Author(s) -
Maity Avishek,
Schwesig Steffen,
Ziegler Fabian,
Sobolev Oleg,
Eckold Götz
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900704
Subject(s) - magnon , multiferroics , antiferromagnetism , polarization (electrochemistry) , condensed matter physics , neutron scattering , scattering , oxide , materials science , spectrometer , physics , chemistry , optics , ferromagnetism , ferroelectricity , optoelectronics , dielectric , metallurgy
Polarized neutron scattering is used to characterize low‐energy magnetic excitations in the multiferroic and antiferromagnetic phases of cupric oxide (CuO). The experiments are performed with the novel type of polarization analysis available at the thermal three‐axes spectrometer PUMA@FRM, II allowing the simultaneous detection of spinflip and nonspinflip scattering. The energy gaps of several magnon modes are determined, and evidence for the existence of electromagnons near 3 and 13 meV is found.