Transverse-field muon-spin-relaxation (SR) measurements have been performed on Ba2YCu3O9-=2.1"0.05) above and below its superconducting transition temperature. The temperature dependence of the magnetic penetration depth, deduced from the SR data, is that of an ordinary s-wave (not d-wave with nodes in the gap function) superconductor. The data at 6 K indicate a magnetic penetration depth of 1400 which, in the limit of extreme anisotropy, reduces to 1065.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics