The commensurate phase of multiferroic HoMn2O5 studied by X-ray magnetic scattering
G. Beutier, A. Bombardi, C. Vecchini, P.G. Radaelli, S. Park, S-W., Cheong, L.C. Chapon
TL;DR
This study investigates the magnetic and structural properties of the multiferroic HoMn2O5 in its commensurate phase using X-ray magnetic scattering, revealing interactions between Mn and Ho sublattices and associated lattice distortions.
Contribution
It provides detailed insights into the magnetic structure and Ho-Mn interactions in HoMn2O5 using X-ray scattering techniques, complementing neutron diffraction data.
Findings
Ho magnetic order is induced by Mn order below 40 K.
A lattice distortion with double the magnetic periodicity is observed.
Magnetic sublattices interact via superexchange mechanisms.
Abstract
The commensurate phase of multiferroic HoMn2O5 was studied by X-ray magnetic scattering, both off resonance and in resonant conditions at the Ho-L3 edge. Below 40 K, magnetic ordering at the Ho sites is induced by the main Mn magnetic order parameter, and its temperature dependence is well accounted for by a simple Curie-Weiss susceptibility model. A lattice distortion of periodicity twice that of the magnetic order is also evidenced. Azimuthal scans confirm the model of the magnetic structure recently refined from neutron diffraction data for both Mn and Ho sites, indicating that the two sublattices interact via magnetic superexchange.
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