Magnetic Order in Transition Metal Oxides with Orbital Degrees of Freedom

Details Magnetic Order in Transition Metal Oxides with Orbital Degrees of Freedom Magnetic Order in Transition Metal Oxides with Orbital Degrees of Freedom

2002-01-25

arxiv.org/abs/cond-mat/0201455v1

Acta Phys. Polon. B 32, 3303 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures

Scientific paper

10.1063/1.1639588

We investigate the frustrated magnetic interactions in cubic transition metal oxides with orbital degeneracy. The $e_g$ orbitals order easier and their ordering explains the $A$-type antiferromagnetic phase in KCuF$_3$ and LaMnO$_3$. In $t_{2g}$ systems the magnetic order changes at a transition from an orbital liquid to orbital ordered states. The fluctuations of $t_{2g}$ orbitals play a prominent role in LaVO$_3$ and YVO$_3$, where they compete with the Jahn-Teller effect and trigger the C-type antiferromagnetic order.

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