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

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.63· OSTI ID:435222

Mitchell, J F ^[1]; Argyriou, D N ^[2]; Jorgensen, J D; Hinks, D G; Potter, C D; Bader, S D ^[1]

---

1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

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 insulator-metal transition, the MnO{sub 6} octahedra of this layered material are more severely distorted when the charge is itinerant than when it is localized. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 435222
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERROMAGNETISM
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MANGANESE COMPOUNDS
MANGANESE OXIDES
NEUTRON DIFFRACTION
PEROVSKITES
PHASE TRANSFORMATIONS
QUATERNARY COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
metal-insulator transition