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Preparation and composition of superconducting copper oxides based on Ga-O layers

Patent ·
OSTI ID:869658
 [1];  [2];  [3]
  1. Bolingbrook, IL
  2. Houston, TX
  3. Evanston, IL
+ Show Author Affiliations
A high temperature superconducting material with the general formula GaSr.sub.2 Ln.sub.1-x MxCu.sub.2 O.sub.7.+-.w wherein Ln is selected from the group consisting of La, Ce, Pt, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Y and M is selected from the group consisting of Ca and Sr, 0.2.ltoreq.x.ltoreq.0.4 and w is a small fraction of one. A method of preparing this high temperature superconducting material is provided which includes heating and cooling a mixture to produce a crystalline material which is subsequently fired, ground and annealed at high pressure and temperature in oxygen to establish superconductivity.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
University of Chicago (Chicago, IL); Northwestern University (Evanston, IL)
Patent Number(s):
US 5374611
OSTI ID:
869658
Country of Publication:
United States
Language:
English

References (5)

Synthesis and structure of a new family of cuprate superconductors: LnSr2Cu2GaO7 journal September 1991
Hole formation and charge transfer in Y1−xCaxSr2Cu2GaO7, a new oxide superconductor journal October 1992
Anomalous x dependence of Tc and possibility of low-temperature structural phase transition in La2−xSrxCu0.99M0.01O4 (M  Ni, Zn, Ga) journal June 1992
New family of planar cuprate superconductors: Effect of nonmagnetic chains and planes journal December 1991
New family of superconducting copper oxides: GaSr2Ln1−xCaxCu2O7 journal April 1992

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