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Superconductivity of Freestanding Tungsten Nanofeatures Grown by Focused-Ion-Beam

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Abstract:

Freestanding tungsten composite nanofeatures were grown by focused-ion-beam-induced deposition with 1 pA ion beam current. The temperature dependent electrical measurements show that the flying nanoscale tungsten is conducting with a room temperature resistivity of 550 Ω cm. It is also superconducting with a Tc above 5.1 K and can be repeatedly thermally cycled. Our results suggest that FIB direct-writing of three-dimensional tungsten composites might be a potential approach to fabricate vertical nanodevices and mask-free superconducting devices.

Keywords: DIRECT-WRITING; FOCUSED-ION-BEAM; FREESTANDING; NANOFEATURE; SUPERCONDUCTIVITY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2850

Publication date: November 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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