Superheating and Supercooling in the Superconducting Transition of Small Indium Spheres

Abstract

1415v R. A. Erickson, Phys. Rev. 90,, 779 (1953). D V. Tanabe, T. Moriya, and S. Sugano, Phys. Rev. Letters 15., 1023Letters 15., (1965. 16 R. Loudon, private communication.

Coexistence of ferromagnetism and superconductivity inErRh4B4single crystals probed by dynamic magnetic susceptibility

“…This would correspond to a cooling of a regular type-I superconductor. 19,32 ͒ When the first superconducting domains appear, the effective magnetic field in normal regions around them increases due to the flux expulsion. This net increase in the internal field in the remaining FM regions stabilizes them to higher temperatures.…”

Discrepancies in determinations of the Ginzburg-Landau parameter

“…1 represent 4% uncertainties, and are for reader convenience only: Larrea et al report errors of roughly this level, and the reports of Smith, Baratoff, and Cardona ͑SBC͒ and FM are assumed comparable since no estimate is provided. There is also a report by Feder et al 12 with suspensions of 1 -5 m tin spheres, which we, however, neglect since the estimated diameter above which size effects are unimportant is ϳ7.5͑T͒, or ϳ5 m at 0.95T c . 11 SBC reported results for tin from measurements on suspensions of 5 -15 m diameter spheres suspended to a volume filling factor of Ͻ5% over 0.3Ͻ t Ͻ 1, and for indium from measurements on 1 -10 m microspheres with a filling factor of Ͻ5% over the same temperature range.…”

Metastable states of superconducting indium films

“…28 and 29. Lasher's suggestion is that the N ~ S transition is first order and takes place at a field He2 <H </arc when d >d~• For a given sample, hysteresis cycles will hence appear when Kd is such that d~_L(Kd) = d. The parameter Ka(t), characteristic of the film, is defined by 3~ (6) Its value for d = de J_ marks the transition from type II to type I behavior and is Kdo• l/x~2.…”

“…(7)] in the parallel case and with Hc2 [Eq. (6)] in the perpendicular case. The transition being second order, in this temperature interval d < d~(t).…”