Upper critical field of periodic and fractal Nb/Cu multilayers

Autor: Joachim Wosnitza, Thomas Trappmann, Hilbert von Löhneysen, Anatoli S. Sidorenko, Christoph Sürgers
Rok vydání: 1996
Předmět:
Zdroj: Czechoslovak Journal of Physics. 46:737-738
ISSN: 1572-9486
0011-4626
DOI: 10.1007/bf02583676
Popis: Measurements of the upper critical fieldB c2 of superconducting Nb/Cu multilayers with fractal and periodic stacking sequence are reported. A positive curvature of the perpendicular magnetic fieldB c2⊥ , i.e. an upward deviation towards low temperatures from the linearB c2⊥ (T) behavior of the WHH theory is observed. The temperature where this upturn occurs depends on the number of fractal scalesS n .
Databáze: OpenAIRE