Internal-strain mediated coupling between polar Bi and magnetic Mn ions in the defect-free quadruple-perovskite BiMn${}_3$Mn${}_4$O${}_{12}$

A. Gauzzi, G. Rousse, F. Mezzadri +10

By means of neutron powder diffraction, we investigated the effect of the polar Bi${}^{3+}$ ion on the magnetic ordering of the Mn${}^{3+}$ ions in BiMn${}_3$Mn${}_4$O${}_{12}$, the counterp…