Coexistence of magnetism and superconductivity in epitaxial GdN/W/NbN/W (100) and related NbN/W (100) multilayers
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
The magnetic and superconducting properties of epitaxial, (100)-oriented GdN/W/NbN/W multilayers have been characterized. We find that the interfacial layer of W permits the GdN/NbN layers to be grown smoothly. We report large flux trapping effects in the magnetic hysteresis loops measured below the superconducting transition temperature (T{sub c}) of the multilayer, indicating the coexistence of magnetism and superconductivity down to layer thicknesses of 40 and 22 {Angstrom} for the NbN and GdN, respectively. Nonmagnetic NbN/W multilayers were also studied; in these multilayers, T{sub c} is enhanced considerably above that of a single NbN layer due to coupling of the superconducting layers across the W spacers. This behavior is fitted to a model which explicitly includes interlayer coupling.
- OSTI ID:
- 638746
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 84; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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