EuTiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>3</mml:mn></mml:msub></mml:math>magnetic structure studied by neutron powder diffraction and resonant x-ray scattering

Abstract

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 $a,b\phantom{\rule{0.16em}{0ex}}$-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 N\'eel temperature. Magnetoelastic coupling, if present, is therefore expected to be negligible.