Superconducting properties of thin films of CeRu2

Dirk Groten; A. C. Wallast; G. J. Nieuwenhuys; J. A. Mydosh; Jan Aarts

doi:10.1117/12.332451

9 December 1998 Superconducting properties of thin films of CeRu₂

Dirk Groten, A. C. Wallast, G. J. Nieuwenhuys, J. A. Mydosh, Jan Aarts

Proceedings Volume 3480, Superconducting Superlattices II: Native and Artificial; (1998) https://doi.org/10.1117/12.332451
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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 F_p is very high, of the order of 10⁹N/m³, and probably due to the strong disorder, but F_p 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.

Citation Download Citation

Dirk Groten, A. C. Wallast, G. J. Nieuwenhuys, J. A. Mydosh, and Jan Aarts "Superconducting properties of thin films of CeRu₂", Proc. SPIE 3480, Superconducting Superlattices II: Native and Artificial, (9 December 1998); https://doi.org/10.1117/12.332451

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