Superconducting superoxygenated La2-xSrxCuO4+$δ$ : Search for phase separation

Morosin, B.; Kwei, G. H.; Schirber, J. E.; Voigt, J. A.; Venturini, E. L.; Goldstone, J. A.

doi:10.1016/0921-4534(91)92085-p

Superconducting superoxygenated La_2-xSr_xCuO_4+$$δ$$ : Search for phase separation

Conference · Wed Oct 02 04:00:00 EDT 2002 · Physica. C, Superconductivity

DOI:https://doi.org/10.1016/0921-4534(91)92085-p· OSTI ID:5532293

Morosin, B. ^[1]; Kwei, G. H. ^[2]; Schirber, J. E. ^[1]; Voigt, J. A. ^[1]; Venturini, E. L. ^[1]; Goldstone, J. A. ^[2]

Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

High pressure (2.3 kbar) high temperature (575°C) oxygen annealed ceramic La_2-xSr_xCuO_4+δ, with x=0.1 and 0.16, have been studied by high-resolution neutron powder diffraction to determine their low temperature structural properties in comparison to similarly oxygenated La₂CuO_4+δ. Unlike La₂CuO_4+δ, these Sr-containing superconductors show no low temperature phase separation. Further, for x= 0.16, the interstitial oxygen appears to be located at (14, 14, z) with z= 0.163(5) and to have a value of δ consistent with La_1.84Sr_0.16CuO_4.019. Such a site is significantly displaced away from the interstitial location, (14, 14, z) with z ≅ 0.25 observed in La₂CuO_4+δ. For x= 0.1, no interstitial oxygen is found and δ = 0.0.

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-36; AC04-76DP00789

OSTI ID:: 5532293

Report Number(s):: SAND--91-0773C; CONF-910736--5; ON: DE91015334

Conference Information:: Journal Name: Physica. C, Superconductivity Journal Volume: 185-189

Country of Publication:: United States

Language:: English

References (3)

Superconducting phase of La 2 Cu O 4 + δ : A superconducting composition resulting from phase separation Jorgensen, J. D.; Dabrowski, B.; Pei, Shiyou Physical Review B, Vol. 38, Issue 16 https://doi.org/10.1103/PhysRevB.38.11337	journal	December 1988
The crystal structure of superconducting La2CuO4.032 by neutron diffraction Chaillout, C.; Cheong, S. W.; Fisk, Z. Physica C: Superconductivity, Vol. 158, Issue 1-2 https://doi.org/10.1016/0921-4534(89)90315-8	journal	April 1989
Two-phase structural refinement of La2CuO4.032 at 15 K Chaillout, C.; Chenavas, J.; Cheong, S. W. Physica C: Superconductivity, Vol. 170, Issue 1-2 https://doi.org/10.1016/0921-4534(90)90233-5	journal	September 1990

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36 MATERIALS SCIENCE
360202* -- Ceramics
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& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
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CRYSTAL STRUCTURE
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ELEMENTS
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INTERSTITIALS
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NEUTRON DIFFRACTION
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
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SCATTERING
STRONTIUM COMPOUNDS
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Superconducting superoxygenated La2-xSrxCuO4+$$δ$$ : Search for phase separation

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References (3)

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Superconducting superoxygenated La_2-xSr_xCuO_4+$$δ$$ : Search for phase separation