Crystal and magnetic structure of the Ca₃Mn₂O₇Ruddlesden–Popper phase: neutron and synchrotron x-ray diffraction study

Abstract

The crystallographic and magnetic structures of Ca₃Mn₂O₇ Ruddlesden-Popper phase have been determined by a combination of neutron and synchrotron x-ray diffraction. Two-phase behaviour observed at room temperature is attributed to an incomplete structural phase transition. The magnetic structure was solved in the <em>Cm</em>′<em>c</em>2′₁ Shubnikov group with dominant G-type antiferromagnetic order in the perovskite bilayers. The temperature evolution of the structural and magnetic parameters is presented.