K.A. Chao
Physical Review B
We report a small roughly logarithmic increase with frequency of the apparent transition temperature in ac susceptibility experiments on a Y-Ba-Cu-O superconducting crystal. Magnetic field enhances the effect. A flux creep model predicts the correct order of magnitude and implies that the transitions previously used to determine the upper-critical field Hc2 actually represent an "irreversibility" line. © 1988 The American Physical Society.
K.A. Chao
Physical Review B
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
Frank Stem
C R C Critical Reviews in Solid State Sciences