Local structural distortion induced by antiferromagnetic ordering in Bi${}_2$Fe${}_4$O${}_9$ studied using neutron total scattering analysis

I. -K. Jeong, N. Hur

To unravel the origin of the dielectric anomaly at the antiferromagnetic ordering of magnetoelectric Bi${}_2$Fe${}_4$O${}_9$ we performed neutron powder diffraction measurements across t…