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Spin-crossover structural transition in the layered perovskite Gd2SrCo2O7

Record type: Article

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.

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Citation

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).

More information

Submitted date: 3 July 2006
Published date: 21 January 2007
Keywords: neutron-diffraction, chemistry, lacoo3, state, crystal-structure, electronic-properties, transition

Identifiers

Local EPrints ID: 54316
URI: http://eprints.soton.ac.uk/id/eprint/54316
ISSN: 1550-235X
PURE UUID: 43d09dd3-beef-4dfa-a748-b5a82831678b

Catalogue record

Date deposited: 30 Jul 2008
Last modified: 17 Jul 2017 14:35

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Contributors

Author: P.J. Hickey
Author: C.S. Knee
Author: P.F. Henry
Author: M.T. Weller

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