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Spin-crossover stru...
Abstract
Ämnesord
Stäng
- 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 P4(2)/mnm symmetry instead of the idealized I4/mmm structure. A structural transition at T approximate to 580 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.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- NEUTRON-DIFFRACTION
- ELECTRONIC-PROPERTIES
- CRYSTAL-STRUCTURE
- STATE
- TRANSITION
- LACOO3
- CHEMISTRY
- STATE
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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