We combine neutron powder diffraction and x-ray single-crystal magnetic diffraction at the Eu L2 edge to scrutinize the magnetic motif of the Eu ions in magnetoelectric EuTiO3. 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 N´eel temperature. Magnetoelastic coupling, if present, is therefore expected to be negligible.

EuTiO3 magnetic structure studied by neutron powder diffraction and resonant x-ray scattering / V. Scagnoli, M. Allieta, H. Walker, M. Scavini, T. Katsufuji, L. Sagarna, O. Zaharko, C. Mazzoli. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 86:9(2012), pp. 094432.094432-1-094432.094432-7. [10.1103/PhysRevB.86.094432]

EuTiO3 magnetic structure studied by neutron powder diffraction and resonant x-ray scattering

M. Allieta;M. Scavini;
2012

Abstract

We combine neutron powder diffraction and x-ray single-crystal magnetic diffraction at the Eu L2 edge to scrutinize the magnetic motif of the Eu ions in magnetoelectric EuTiO3. 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 N´eel temperature. Magnetoelastic coupling, if present, is therefore expected to be negligible.
Settore CHIM/02 - Chimica Fisica
Settore FIS/03 - Fisica della Materia
PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/208569
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