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Superconductivity and flux pinning in Nd{sub 1+x}Ba{sub 2-x}Cu{sub 3}O{sub 7+{delta}}

Conference ·
OSTI ID:10110041
The substitution of Nd{sup +3} for Ba{sup +2} in Nd{sub 1+x}Ba{sub 2-x}Cu{sub 3}O{sub 7+{delta}} (Nd123ss) increase the occupation of O(5) sites. For x > 0.1 there is a significant depression of {Tc} and for x < 0.1 there is no substantial decrease {Tc} within experimental error. {Tc} vs x is characterized by two plateaus analogous {Tc} vs {delta} in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (Y123). Analysis of oxygen contents of Nd123ss suggests the analogy with Y123 is valid. The transition width and Meissner fraction for all Nd123ss samples are strongly dependent on the sintering temperatures. While {Tc} is not affected over the range 0
Research Organization:
Ames Lab., IA (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
10110041
Report Number(s):
IS-M--732; CONF-920802--42; ON: DE93004444
Country of Publication:
United States
Language:
English