R. Ghez, J.S. Lew
Journal of Crystal Growth
A μSR study of the temperature dependence of the London penetration depth λ in sintered samples of YBa2Cu3Oz (with various oxygen contents x), YBa2Cu4O8 and Bi2Sr2CaCu2O8 is presented. It is found that the temperature behavior of λ of all these cuprate superconductors is consistent with conventional s-wave pairing. However, there are significant differences concerning the exact temperature dependence of λ in these materials. In YBa2Cu3Oz with high x, the behavior of λ(T) is well described by the two-fluid model (strong coupling), whereas λ(T) in YBa2Cu3Oz with low x, YBa2Cu4O8 and Bi2Sr2CaCu2O8 is in better agreement with weak-coupling BCS theory. Possible reasons for the different temperature behavior of λ in these materials are discussed. © 1991.
R. Ghez, J.S. Lew
Journal of Crystal Growth
Thomas H. Baum, Carl E. Larson, et al.
Journal of Organometallic Chemistry
R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997