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Crystal and magnetic structure of LaTiO3: Evidence for nondegenerate t2g orbitals

M. Cwik, T. Lorenz, J. Baier, R. Müller, G. André, F. Bourée, F. Lichtenberg, A. Freimuth, R. Schmitz, E. Müller-Hartmann, and M. Braden
Phys. Rev. B 68, 060401(R) – Published 7 August 2003
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Abstract

The crystal and magnetic structures of LaTiO3 have been studied by x-ray and neutron-diffraction techniques using nearly stoichiometric samples. We find a strong structural anomaly near the antiferromagnetic ordering TN=146K. 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.

  • Received 4 February 2003

DOI:https://doi.org/10.1103/PhysRevB.68.060401

©2003 American Physical Society

Authors & Affiliations

M. Cwik1, T. Lorenz1, J. Baier1, R. Müller1, G. André2, F. Bourée2, F. Lichtenberg3, A. Freimuth1, R. Schmitz4, E. Müller-Hartmann4, and M. Braden1

  • 1II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
  • 2Laboratoire Léon Brillouin, CEA/CNRS, F-91191 Gif-sur-Yvette CEDEX, France
  • 3Experimentalphysik VI, EKM, Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany
  • 4Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany

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Vol. 68, Iss. 6 — 1 August 2003

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