Resonant soft X-ray scattering studies of multiferroic YMn2O5

Abstract

Abstract. We performed soft X-ray resonant scattering at the Mn L 2,3-and OK edges of YMn 2O5. While the resonant intensity at the Mn L2,3 edges reflects the magnetic order parameter, the resonant scattering at the O K edge is found to be directly related to the macroscopic ferroelectric polarization. The latter observation reveals the important role of the spin-dependent Mn-O hybridization for the multiferroicity of YMn 2O5. We present details about how to obtain correct energy dependent lineshapes and discuss the origin of the resonant intensity at the O K edge.

Resonant elastic soft x-ray scattering

“…The data were obtained from a measured XAS spectrum that was matched to tabulated values far away from resonance [36]. They are also consistent with numbers derived from the widths of diffraction peaks that vary across the resonance [18,33]. At resonance maximum, the absorption length becomes as small as 20 nm.…”

“…This dominates in many cases the peak width in RSXS, which then changes a lot as a function of photon energy. A more detailed discussion of this behaviour, its consequences and the corresponding correction methods can be found in [18].…”

“…Similar to what has been described in [22] the subscript of the resonance factors in equation (19) corresponds to their symmetry representation in the O h -point group. Comparing equations (18) and (19) it can be seen that the spherical approximation may still be used, as long as the magnetic term linear in ŝ dominates the resonant scattering signal. We mention that already for O h -symmetry the terms quadratic in ŝ differ from equation (17).…”

Hot hole transfer from Ag nanoparticles to multiferroic YMn2O5 nanowires enables superior photocatalytic activity

“…57 Resonant soft X-ray scattering results at the O-K edge and DFT calculations revealed this magnetic polarization of the O2p states as a consequence of strong spin-dependent hybridization of O2p and Mn3d states, resulting in a purely electronic contribution to the ferroelectric polarization. [57][58][59] Therefore, in addition to the ionic contribution, ferroelectric polarization in YMn 2 O 5 has an electronic contribution. 58 Orbital-resolved PDOS spectra of Ag atoms in the far and close configurations are shown in Fig.…”

Time-resolved resonant soft X-ray scattering combined with MHz synchrotron X-ray and laser pulses at the Photon Factory

“…Among the RMn 2 O 5 family, SmMn 2 O 5 has a high electric polarization and a unique orientation of the magnetic moments (Ishii et al, 2016(Ishii et al, , 2018Yahia et al, 2017). An RSXS experiment around the Mn L II,III -and O K-edges of RMn 2 O 5 provides important information not only on the ordering of the Mn magnetic moment coupled with the electronic state but also on the spin polarization of oxygen ions via 2p -3d orbital hybridization of oxygen and Mn ions (Partzsch et al, 2011;de Souza et al, 2011;Huang et al, 2016;Ishii et al, 2018). We demonstrate the transient dynamics of the magnetic ordering and electronic polarization in SmMn 2 O 5 by high-repetition-rate pump-probe RSXS measurement around the Mn L III -(645 eV) and O Kedges (530 eV) on BL-16A at the Photon Factory of the High Energy Accelerator Research Organization.…”