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Vortex-lattice phase diagram of Nb/NbZr multilayers

✍ Scribed by T. Nojima; M. Kinoshita; S. Nakano; Y. Kuwasawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
148 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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✦ Synopsis

Multilayer of Nb/NbZr shows an upturn behavior in the parallel upper critical field HaN(T ). In this work, we studied the critical current density J~ as a function of magnetic field H and of the angle between H and film plane at various temperatures. From the non-monotonic behavior Jc(H), we found two characteristic fields, Hp and HL, above and below the upturn temperature. An analysis with the angular dependence shows that a dimensional crossover in the mixed state and a shift of the order parameter from Nb to N-bZr occur at Hp and H t, respectively.

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