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Title: 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 (United States)
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)

New family of planar cuprate superconductors: Effect of nonmagnetic chains and planes journal December 1991
Synthesis and structure of a new family of cuprate superconductors: LnSr2Cu2GaO7 journal September 1991
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
Hole formation and charge transfer in Y1−xCaxSr2Cu2GaO7, a new oxide superconductor journal October 1992
New family of superconducting copper oxides: GaSr2Ln1−xCaxCu2O7 journal April 1992

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Related Subjects

preparation
composition
superconducting
copper
oxides
based
ga-o
layers
temperature
material
formula
gasr
ln
1-x
mxcu
selected
consisting
eu
gd
tb
tm
sr
ltoreq
fraction
method
preparing
provided
heating
cooling
mixture
produce
crystalline
subsequently
fired
ground
annealed
pressure
oxygen
establish
superconductivity
crystalline material
conducting material
copper oxide
superconducting material
temperature superconducting
oxides based
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