ISSN:
1572-9605
Keywords:
Superconducting superlattices
;
structural characterization
;
flux motion
;
critical currents
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We investigated the structural and superconducting properties ofc-axis oriented (YBa2Cu3O7) nY /(PrBa2Cu3O7) npr superlattices with thicknesses of the individual layers down to one unit cell (10≥nY≥1; 18〉nPr≥ 1). By transmission electron microscopy and X-ray diffraction we find an excellent structural quality of the samples, though the quantitative analysis shows the existence of defects. In superlattices with decoupled YBa2Cu3O7 layers of two unit cell thickness we find a highT c value of 75 K. We probed the flux line structure in the superlattices by measurements of the critical current density in magnetic fields. The experiments show that the flux-line dynamics is dominated by the movement of pancake vortices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00730393
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