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

Abstract

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.

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References in corpus (4)

• Orbital liquid in three dimensional Mott insulator: $LaTi{O}_3$
• Spin Dynamics and Orbital State in LaTiO_3
• Interplay between orbital ordering and lattice distortions in LaMnO3, YVO3, and YTiO3
• Origin of G-type Antiferromagnetism and Orbital-Spin Structures in ${\mathrm{LaTiO}}_3$

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