Weides, M. , Schindler, C. and Kohlstedt, H. (2007) Low-Tc Josephson junctions with tailored barrier. Journal of Applied Physics, 101(6), 063902. (doi: 10.1063/1.2655487)
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Abstract
Nb∕Al2O3∕Ni0.6Cu0.4∕NbNb∕Al2O3∕Ni0.6Cu0.4∕Nb based superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions with a thickness step in the metallic ferromagnetic Ni0.6Cu0.4Ni0.6Cu0.4 interlayer were fabricated. The step was defined by optical lithography and controlled etching. The step height is on the scale of a few angstroms. Experimentally determined junction parameters by current-voltage characteristics and Fraunhofer pattern indicate uniform ferromagnetic layer thicknesses and the same interface transparencies for etched and nonetched F layers. This technique could be used to tailor low-Tclow-Tc Josephson junctions having controlled critical current densities at defined parts of the junction area, as needed for tunable resonators, magnetic-field driven electronics, or phase modulated devices.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Weides, Professor Martin |
Authors: | Weides, M., Schindler, C., and Kohlstedt, H. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Journal of Applied Physics |
Publisher: | American Institute of Physics |
ISSN: | 0021-8979 |
ISSN (Online): | 1089-7550 |
Published Online: | 20 March 2007 |
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