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Proceedings Paper

Superconducting properties of thin films of CeRu2
Author(s): Dirk Groten; A. C. Wallast; G. J. Nieuwenhuys; J. A. Mydosh; Jan Aarts
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Paper Abstract

Thin films of CeRu2 have been prepared with sharp superconducting transitions at temperatures of about 5.6K at large thickness, slowly decreasing to 4K around 50 nm. Below 50 nm the superconducting transition temperature decreases abruptly. The flux pinning properties of the thicker films are very anomalous. At low fields the pinning force Fp is very high, of the order of 109N/m3, and probably due to the strong disorder, but Fp drops to zero at unusually low reduced fields. This leads to a field- temperature phase diagram with an upper critical field line quite similar to the one for bulk crystals, but with an irreversibility line which lies much lower; it cannot be described with conventional theories for either 2D or 3D vortex lattice melting.

Paper Details

Date Published: 9 December 1998
PDF: 8 pages
Proc. SPIE 3480, Superconducting Superlattices II: Native and Artificial, (9 December 1998); doi: 10.1117/12.332451
Show Author Affiliations
Dirk Groten, Leiden Univ. (Netherlands)
A. C. Wallast, Leiden Univ. (Netherlands)
G. J. Nieuwenhuys, Leiden Univ. (Netherlands)
J. A. Mydosh, Leiden Univ. (Netherlands)
Jan Aarts, Leiden Univ. (Netherlands)

Published in SPIE Proceedings Vol. 3480:
Superconducting Superlattices II: Native and Artificial
Ivan Bozovic; Davor Pavuna, Editor(s)

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