Abstract:
High-resolution neutron powder diffraction is used to demonstrate that the Eu2+ moments in EuZrO3 are oriented along the c axis, in contrast to EuTiO3 where the moments lie within the ab plane. By applying a Landau theory analysis to the Ti and Zr system we are able to contrast the differing magnetoelectric coupling symmetries resulting from the magnetic space groups of the two ordered structures. The observed order parameter is consistent with the asymptotic three-dimensional Ising model.
