Frustrated superexchange interaction versus orbital order in a LaVO3 crystal.
Measurements of magnetic, transport properties, thermal conductivity, and magnetization under pressure as well as neutron diffraction have been made on a single crystal and powder sample of LaVO3. The Néel temperature was found to mark a transition from the phase with both frustrated superexchange interaction and spin-orbit lambdaL.S coupling to the phase where the Jahn-Teller orbital-lattice coupling dominates. The dramatic reduction of absolute entropy in the paramagnetic phase is explained in terms of forming a long-range coherent state due to the interference between frustrated orbits and spins.
Zhou
J-S
JS
Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA.
Ren
Y
Y
Yan
J-Q
JQ
Mitchell
J F
JF
Goodenough
J B
JB