Title :
Fabrication and properties of ac-dc superconducting rectifier
Author :
González, E.M. ; Villegas, J.E. ; González, M.P. ; Anguita, J.V. ; Vicent, J.L.
Author_Institution :
Dept. Fisica Mater., Univ. Complutense, Madrid, Spain
fDate :
6/1/2005 12:00:00 AM
Abstract :
Magnetron sputtering, electron beam lithography and etching techniques allow us to fabricate Nb thin films on array of periodic nonsuperconducting nanometric triangles. These asymmetric pinning potentials induce a ratchet effect on the vortex lattice motion: injecting an ac current on the sample yields a dc voltage. This rectification effect does not depend on the ac frequency in the kHz range. The effect occurs for magnetic as well as nonmagnetic pinning centers. The rectification is enhanced at lower temperatures.
Keywords :
electron beam lithography; flux flow; flux pinning; flux-line lattice; niobium compounds; rectifiers; rectifying circuits; sputter deposition; superconducting devices; superconducting superlattices; superconducting thin films; Nb; ac-dc superconducting rectifier; asymmetric pinning potentials; electron beam lithography; etching techniques; magnetron sputtering; periodic nonsuperconducting nanometric triangles; ratchet effect; rectification effect; superconducting device fabrication; superconducting films; thin films; vortex lattice motion; Electron beams; Fabrication; Lattices; Lithography; Niobium; Rectifiers; Sputter etching; Sputtering; Superconducting magnets; Superconducting thin films; Rectifiers; superconducting device fabrication; superconducting devices; superconducting films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.850103
