Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering
H. J. Lewtas, A. T. Boothroyd, M. Rotter, D. Prabhakaran, H. Mueller,, M. D. Le, B. Roessli, J. Gavilano, P. Bourges
TL;DR
This study investigates magnetic excitations and magneto-elastic coupling in LuMnO3 using inelastic neutron scattering, revealing detailed magnon dispersion, exchange interactions, and magnetic anisotropy in this multiferroic material.
Contribution
The paper provides the first detailed magnon dispersion data and exchange parameter analysis for LuMnO3, enhancing understanding of its magnetic properties compared to other hexagonal RMnO3 compounds.
Findings
Magnon dispersion measured along main symmetry directions.
Exchange parameters determined from spin-wave model.
Magnetic anisotropy analyzed via crystal field effects.
Abstract
We present data on the magnetic and magneto-elastic 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.
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