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Upper critical field of periodic and fractal Nb/Cu multilayers

Sidorenko, Anatoli; Sürgers, Christoph; Trappmann, Thomas; Wosnitza, Joachim; Löhneysen, Hilbert v.

Abstract:
Measurements of the upper critical field B-c2 of superconducting Nb/Cu multilayers with fractal and periodic stacking sequence are reported. A positive curvature of the perpendicular magnetic field B-c2 perpendicular to, i.e. an upward deviation towards low temperatures from the linear B-c2 perpendicular to(T) behavior of the WHH theory is observed. The temperature where this upturn occurs depends on the number of fractal scales S-n.


Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 1996
Sprache Englisch
Identifikator ISSN: 0011-4626
KITopen ID: 194296
Erschienen in Czechoslovak Journal of Physics
Band 46
Heft Suppl. 2
Seiten 737-738
Schlagworte superconducting superlattices
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