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Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Lewtas HJ, Boothroyd AT, Rotter M, Prabhakaran D, Muller H, Le MD, Roessli B, Gavilano J, Bourges P,
Project Interplay of Magnetism and Superconductivity in Unconventional Superconductors
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Original article (peer-reviewed)

Volume (Issue) 82(18)
Page(s) 184420-1 - 184420-7
Title of proceedings PHYSICAL REVIEW B
DOI 10.1103/PhysRevB.82.184420


We present data on the magnetic and magnetoelastic coupling in the hexagonal multiferroic manganite LuMnO3 from inelastic neutron scattering, magnetization, and thermal-expansion measurements. We measured the magnon dispersion along the main symmetry directions and used this data to determine the principal exchange parameters from a spin-wave model. An analysis of the magnetic anisotropy in terms of the crystal field acting on the Mn is presented. We compare the results for LuMnO3 with data on other hexagonal RMnO3 compounds.