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Transport properties of superconducting amorphous W-based nanowires fabricated by focused-ion-beam-induced-deposition for applications in Nanotechnology

Published online by Cambridge University Press:  31 January 2011

Jose M De Teresa ,
Amalio Fernandez-Pacheco ,
Rosa Cordoba ,
Javier Sese ,
Ricardo Ibarra ,
Isabel Guillamon ,
Hermann Suderow  and
Sebastian Vieira
Jose M De Teresa
Affiliation:
deteresa@unizar.es, ICMA, CSIC-U.Zaragoza, Condensed Matter Physics Department, Facultad de Ciencias, Plaza San Francisco, Zaragoza, 50009, Spain, +34 976762463, +34 976761229
Amalio Fernandez-Pacheco
Affiliation:
fpacheco@unizar.es, University of Zaragoza, Zaragoza, Spain
Rosa Cordoba
Affiliation:
rocorcas@unizar.es, University of Zaragoza, Zaragoza, Spain
Javier Sese
Affiliation:
jsese@unizar.es, University of Zaragoza, Zaragoza, Spain
Ricardo Ibarra
Affiliation:
ibarra@unizar.es, University of Zaragoza, Zaragoza, Spain
Isabel Guillamon
Affiliation:
isabel.guillamon@uam.es, University Autonomous of Madrid, Madrid, Spain
Hermann Suderow
Affiliation:
hermann.suderow@uam.es, University Autonomous of Madrid, Madrid, Spain
Sebastian Vieira
Affiliation:
sebastian.vieira@uam.es, University Autonomous of Madrid, Madrid, Spain
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Abstract

We report transport measurements of superconducting amorphous W-based nanodeposits fabricated by focused-ion-beam-induced-deposition (FIBID) technique using W(CO)6 as the gas precursor. We have found that nanowires with width down to ˜100 nm can be grown by FIBID, maintaining the relatively high TC of �5.2 K shown by wider nanodeposits. The critical current found in these nanowires is in the range of 0.8 mA/?m2 at 2 K. At that temperature the critical field HC2 is found to be ?8 T. As previously shown by STM measurements [I. Guillam�n et al., New Journal of Physics 10, 093005 (2008)], these nanodeposits closely follow the BCS theory and are very stable under ambient conditions. All these features pave the way for a wide range of applications of these FIBID W-based nanowires in the field of Nanotechnology.

Keywords

superconductingelectrical propertiesnanoscale

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