Dramatic Switching of Magnetic Exchange in a Classic Transition Metal Oxide: Evidence for Orbital Ordering

Details Dramatic Switching of Magnetic Exchange in a Classic Transition Metal Oxide: Evidence for Orbital Ordering Dramatic Switching of Magnetic Exchange in a Classic Transition Metal Oxide: Evidence for Orbital Ordering

1996-11-13

arxiv.org/abs/cond-mat/9611109v1

Phys. Rev. Lett., vol. 78, 507-510 (1997)

Physics

Condensed Matter

Strongly Correlated Electrons

11 papges, 4 figures, Revtex. Accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.78.507

Spin correlations in metallic and insulating phases of $V_2O_3$ and its derivatives are investigated using magnetic neutron scattering. Metallic samples have incommensurate spin correlations varying little with hole doping. Paramagnetic insulating samples have spin correlations only among near neighbors. The transition from either of these phases into the low temperature insulating antiferromagnetic phase is accompanied by an abrupt change of dynamic magnetic short range order. Our results support the idea that the transition into the antiferromagnetic insulator is also an orbital ordering transition.

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