Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
We find scaling behavior of the linear ac-impedence consistent with a phasetransition from a normal or vortex fluid state into a superconducting or vortex glass state in measurements on cuprate YBa2Cu3O7 superconducting thin films in strong fields (0.55 T). At the vortex glass transition temperature, Tg=86.1 K, as determined from dc IV-curves we find scaling with frequency of the impedance amplitude, | Z | ≈ ω 0.83, and a frequency independent phase, ø=74°. In addition a critical slowing down of the vortex dynamics consistent with a diverging correlation time is observed as Tg is approached, τ≈(T-Tg)-5.8. © 1991.
Daniel J. Coady, Amanda C. Engler, et al.
ACS Macro Letters
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
J. Paraszczak, J.M. Shaw, et al.
Micro and Nano Engineering
D.D. Awschalom, J.-M. Halbout
Journal of Magnetism and Magnetic Materials