Magnetic and crystal structures of BiCrO3

Céline Darie (1) , Céline Goujon (2) , Holger Klein (1) , Maria Bacia (2) , Pierre Toulemonde (1) , Pierre Bordet (1) , Emmanuelle Suard (3)

1 NEEL - MRS - Matériaux, Rayonnements, Structure
2 NEEL - X'Press - X'Press : diffraction et hautes pressions
3 ILL - Institut Laue-Langevin

Polycrystalline samples of BiCrO3 were synthesized by high pressure-high temperature solid state reaction in a Conac anvil-type apparatus at 2 GPa and 805 degrees C. Neutron powder diffractograms were collected on the D20 and D2B instruments of the ILL-Grenoble between 2 K and 470 K. Magnetic susceptibility measurements show the onset of magnetic order at 110 K followed by a large increase below 80 K. The neutron diffraction data indicate the appearance of G-type antiferromagnetic order at the 114 K transition temperature. with all spins aligned along one of the unit cell axes and antiparallel spins on different Cr sites. This is followed by a progressive spin reorientation between 80 K and 60 K. (C) 2008 Elsevier Masson SAS. All rights reserved.

Mots clés: BiCrO3; Magnetic structure; Powder neutron diffraction

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Céline Darie, Céline Goujon, Holger Klein, Maria Bacia, Pierre Toulemonde, et al.. Magnetic and crystal structures of BiCrO3. Solid State Sciences, 2010, 12 (5), pp.660. ⟨10.1016/j.solidstatesciences.2008.12.004⟩. ⟨hal-00703437⟩