EuTiO ₃ magnetic structure studied by neutron powder diffraction and resonant x-ray scattering

We combine neutron powder diffraction and x-ray single-crystal magnetic diffraction at the Eu L ₂ edge to scrutinize the magnetic motif of the Eu ions in magnetoelectric EuTiO ₃. Our measurements are consistent with an antiferromagnetic G-type pattern with the Eu magnetic moments ordering along the a,b-plane diagonal. Recent reports of a novel transition at 2.75 K with a flop of magnetic moments upon poling the sample in an electric field cannot be confirmed for a nonpoled sample. Our neutron diffraction data do not show any significant change of the structure below the Néel temperature. Magnetoelastic coupling, if present, is therefore expected to be negligible.