Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
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.
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
R.M. Macfarlane, R.L. Cone
Physical Review B - CMMP
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
J.H. Kaufman, Owen R. Melroy, et al.
Synthetic Metals