Lawrence Suchow, Norman R. Stemple
JES
SQUID susceptibility measurements of the high Tc superconductor Sr0.2La1.8CuO4, with a 40 K resistive onset, are reported for fields from 1 μT to 4.5 T (10mG to 45 kG). Data show an average lower critical field of 30 mT at 5 K, but with nonlinearities appearing as low as 100 μT. Zero field cooling and subsequent application of a field shows a diamagnetic shielding effect reaching 100% in the lowest fields with a 37 K onset and 31 K midpoint. The observed Meissner effect in single phase material exceeds 40% but decreases with oxygen annealing even though Tc increases. © 1993.
Lawrence Suchow, Norman R. Stemple
JES
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
J.V. Harzer, B. Hillebrands, et al.
Journal of Magnetism and Magnetic Materials
M. Hargrove, S.W. Crowder, et al.
IEDM 1998