Magnetic penetration depth and surface resistance in ultrahigh-purity YBa2Cu3O7-δ crystals

被引：91

作者：

Kamal, S ^{[1
]}

Liang, RX ^{[1
]}

Hosseini, A ^{[1
]}

Bonn, DA ^{[1
]}

Hardy, WN ^{[1
]}

机构：

[1] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.58.R8933

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have succeeded in growing very high-purity (99.995%) YBa2Cu3O7-delta crystals in BaZrO3 crucibles and have measured Delta lambda(T) and R-s(T) at 1 GHz in crystals with various oxygen treatments. For an oxygen vacancy level of delta = 0.007, Delta lambda and R-s essentially reproduce our previous results and show no sign of the existence of the two order parameter components as recently reported by Srikanth et al. on BaZrO3-grown crystals. For other oxygen concentrations, we have in some cases observed deviations from the linear low T dependence of Delta lambda, but never any sign of a second transition. [S0163-1829(98)50538-3].

引用

页码：R8933 / R8936

页数：4

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