Effects of RE(2)O(3) (RE = Tm, Sc, Yb) addition on the superconducting properties of ErBa(2)Cu(3)O(y)

We investigated the effects of added Tm(2)O(3), Sc(2)O(3), and Yb(2)O(3) on the superconducting properties of sintered Er123 samples. Tm(2)O(3) addition caused the least T(c) degradation, exhibiting a T(c) above 90 K even for 17 vol% addition. Samples with added Sc(2)O(3) maintained a T(c) at above...

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Published in:Physica. C, Superconductivity Superconductivity, 2009-10, Vol.469 (15-20), p.1157-1160
Main Authors: Kita, R, Hosoya, N, Otawa, N, Kawabata, S, Nakamura, T, Miura, O, Mukaida, M, Yamada, K, Ichinose, A, Matsumoto, K, Horii, M S, Yoshida, Y
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Language:English
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Summary:We investigated the effects of added Tm(2)O(3), Sc(2)O(3), and Yb(2)O(3) on the superconducting properties of sintered Er123 samples. Tm(2)O(3) addition caused the least T(c) degradation, exhibiting a T(c) above 90 K even for 17 vol% addition. Samples with added Sc(2)O(3) maintained a T(c) at above 90 K up to an addition of 7.2 vol%, while Yb(2)O(3)-containing samples showed a monotonic decrease in T(c) with increased vol% of added Yb(2)O(3). Tm(2)O(3)- containing samples exhibited a slight increase in J(c)(0.1 T)/J(c)(0) and had constant J(c) values even for 17 vol% addition. XRD and SEM results indicate that the Tm(2)O(3) is very stable in the superconducting matrix.
ISSN:0921-4534
DOI:10.1016/j.physc.2009.01.020