Observation of Electronic Ferroelectric Polarization in Multiferroic YMn${}_2$O${}_5$

S. Partzsch, S. B. Wilkins, J. P. Hill +5

We report the observation of a magnetic polarization of the O\,$2p$-states in YMn${}_2$O${}_5$ through the use of soft X-ray resonant scattering at the oxygen $K$-edge. Remarkably, we…