Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate t2gt_{2g}-orbitals

The crystal and magnetic structure of LaTiO3 ~ has been studied by x-ray and neutron diffraction techniques using nearly stoichiometric samples. We find a strong structural anomaly near the antiferromagnetic ordering, T$_N$=146 K. In addition, the octahedra in LaTiO3 exhibit an intrinsic distortion which implies a splitting of the t2g-levels. Our results indicate that LaTiO3 should be considered as a Jahn-Teller system where the structural distortion and the resulting level splitting are enhanced by the magnetic ordering.Comment: 4 pages 5 figure

Biennale internationale d'estampe contemporaine de Trois-Rivières

Highlighting the first edition of an international event, this catalogue brings together 222 works by 38 printmakers representing 17 countries. To Desaulnier's presentation of how the event was organized, are added opinion texts by the jury members, as well as dossiers on the artists, which contain technical data, photographs of each work exhibited, and personal comments. Includes substantial documentation on Quebec's collective workshops (history, techniques and services). Biographical notes. 11 bibl. ref