Ferroelectricity induced by acentric spin-density waves in YMn${}_2$O${}_5$

L. C. Chapon, P. G. Radaelli, G. R. Blake +2

The commensurate and incommensurate magnetic structures of the magnetoelectric system YMn${}_2$O${}_5$, as determined from neutron diffraction, were found to be spin-density waves…