Charge delocalization and structural response in layered La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}: Enhanced Jahn-Teller distortion in the metallic regime

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Description

Temperature dependent neutron diffraction studies on melt-grown crystals of the layered compound La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} reveal a dramatic structural response to the onset of ferromagnetism and the coincident insulator-metal transition. Unlike the related manganite perovskites, whose Jahn-Teller distorted octahedra become more regular at temperatures below the metal-insulator transition, the MnO{sub 6} octahedra of this layered material are more severely distorted when the charge is itinerant than when it is localized.

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17 p.

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Mitchell, J. F.; Argyriou, D. N. & Jorgensen, J. D. November 1996.

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Description

Temperature dependent neutron diffraction studies on melt-grown crystals of the layered compound La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} reveal a dramatic structural response to the onset of ferromagnetism and the coincident insulator-metal transition. Unlike the related manganite perovskites, whose Jahn-Teller distorted octahedra become more regular at temperatures below the metal-insulator transition, the MnO{sub 6} octahedra of this layered material are more severely distorted when the charge is itinerant than when it is localized.

Physical Description

17 p.

Notes

OSTI as DE97001077

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  • Other Information: PBD: [1996]

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  • Other: DE97001077
  • Report No.: ANL/MSD/PP--90186
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/399708 | External Link
  • Office of Scientific & Technical Information Report Number: 399708
  • Archival Resource Key: ark:/67531/metadc685599

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  • November 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 19, 2015, 12:26 p.m.

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Mitchell, J. F.; Argyriou, D. N. & Jorgensen, J. D. Charge delocalization and structural response in layered La{sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}: Enhanced Jahn-Teller distortion in the metallic regime, report, November 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc685599/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.