Enhancement of transport critical current density by Gd substitution in YBa2Cu3O7

Sastry, P. V. P. S. S.; Gopalakrishnan, I. K.; Yakhmi, J. V.; Iyer, R. M.
April 1988
Applied Physics Letters;4/25/1988, Vol. 52 Issue 17, p1447
Academic Journal
Samples with composition Y1-xGdxBa2Cu3O7 (x=0.001–0.005) are prepared and TC, ΔTC, JC, ρ(300 K) are measured. It is shown that upon substituting yttrium by small amounts of gadolinium, JC can be improved significantly. The anticorrelation of JC with ΔTC and ρ(300 K) is established. The possible role of gadolinium in enhancing JC is discussed. General guidelines for getting high JC values are gathered.


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