Electron diffraction study of La{sub 2}Li{sub O.5}Cu{sub O.5}O{sub 4}

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La{sub 2}Li{sub 0.5}Cu{sub 0.5}O{sub 4} has been investigated by electron diffraction and high resolution electron microscopy at room temperature. Ordering between Li and Cu cations is fairly perfect within the ({anti a}, {anti c}) plane but there is disorder between Cu and Li cations along the {anti b} axis. The detection of weak reflections which violate the C centering of the Cmmm space group (initially proposed for this compound), indicates that the crystal symmetry allows lattice distortions. The evolution of the structure as a function of the temperature may lead to determine whether the low energy singlet-triplet excitation, found in ... continued below

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12 p.

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Moshopoulou, E.; Thompson, J.D.; Sarrao, J.L. & Fisk, Z. March 1, 1998.

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  • Los Alamos National Laboratory
    Publisher Info: Los Alamos National Lab., Applied Theoretical Physics Div., NM (United States)
    Place of Publication: New Mexico

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Description

La{sub 2}Li{sub 0.5}Cu{sub 0.5}O{sub 4} has been investigated by electron diffraction and high resolution electron microscopy at room temperature. Ordering between Li and Cu cations is fairly perfect within the ({anti a}, {anti c}) plane but there is disorder between Cu and Li cations along the {anti b} axis. The detection of weak reflections which violate the C centering of the Cmmm space group (initially proposed for this compound), indicates that the crystal symmetry allows lattice distortions. The evolution of the structure as a function of the temperature may lead to determine whether the low energy singlet-triplet excitation, found in NMR/NQR studies, is coupled with lattice distortions.

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12 p.

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INIS; OSTI as DE98004368

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  • Spectroscopies in novel superconductors, Cape Cod, MA (United States), 14-18 Sep 1997

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  • Other: DE98004368
  • Report No.: LA-UR--97-4820
  • Report No.: CONF-9709216--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/658351 | External Link
  • Office of Scientific & Technical Information Report Number: 658351
  • Archival Resource Key: ark:/67531/metadc708249

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 3, 2016, 1:31 p.m.

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Moshopoulou, E.; Thompson, J.D.; Sarrao, J.L. & Fisk, Z. Electron diffraction study of La{sub 2}Li{sub O.5}Cu{sub O.5}O{sub 4}, report, March 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc708249/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.