Journal
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume 437-38, Issue -, Pages 349-352Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2005.12.046
Keywords
Josephson junctions; pi-contact; superconductor ferromagnet superconductor junctions
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We present ferromagnetic Nb/Al2O3/Ni60Cu40/Nb Josephson junctions (SIFS) with an ultrathin Al2O3 tunnel barrier. The junction fabrication was optimized regarding junction insulation and homogeneity of current transport. Using ion-beam-etching and anodic oxidation we defined and insulated the junction mesas. The additional 2 nm thin Cu-layer below the ferromagnetic NiCu (SINFS) lowered interface roughness and ensured very homogeneous current transport. A high yield of junctional devices with j(c) spreads less than 2% was obtained. (c) 2005 Elsevier B.V. All rights reserved.
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