Spin-crossover structural transition in the layered perovskite Gd2SrCo2O7
Hickey, P.J., Knee, C.S., Henry, P.F. and Weller, M.T. (2007) Spin-crossover structural transition in the layered perovskite Gd2SrCo2O7. Physical Review B, 75, (2) (doi:10.1103/PhysRevB.75.024113).
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Description/Abstract
The structure of the double-layer Ruddlesden-Popper phase Gd2SrCo2O7 has been determined in the temperature range 300–973 K using powder neutron diffraction. The room-temperature structure is tetragonal and displays small tilts of the oxygen sublattice that are described in P42/mnm symmetry instead of the idealized I4/mmm structure. A structural transition at T580 K is characterized by reduction of unit cell symmetry and a marked axial elongation of the CoO6 octahedra; this behavior is associated with a spin crossover at the octahedrally coordinated cobalt (III) ions, most likely from an intermediate to a high spin configuration.
| Item Type: | Article |
|---|---|
| ISSNs: | 1098-0121 (print) |
| Related URLs: | |
| Keywords: | neutron-diffraction, chemistry, lacoo3, state, crystal-structure, electronic-properties, transition |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 54316 |
| Date Deposited: | 30 Jul 2008 |
| Last Modified: | 01 Jun 2011 12:01 |
| Contributors: | Hickey, P.J. (Author) Knee, C.S. (Author) Henry, P.F. (Author) Weller, M.T. (Author) |
| Date: | 21 January 2007 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/54316 |
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