Evidence for centrosymmetry breaking and multiferroic properties in the A-site ordered quadruple perovskite YMn${}_3$Mn${}_4$O${}_{12}$

M Verseils, F Mezzadri, D Delmonte +7

By means of single-crystal X-ray diffraction we have revealed the breaking of centrosymmetry when lowering the temperature under T${}_s$ = 200 K concomitantly with the setting of a c…