Superconducting nanowires, with a critical temperature of 5.2 K, have beensynthesized using an ion-beam-induced deposition, with a Gallium focused ionbeam and Tungsten Carboxyl, W(CO)6, as precursor. The films are amorphous, withatomic concentrations of about 40, 40, and 20 % for W, C, and Ga, respectively.Zero Kelvin values of the upper critical field and coherence length of 9.5 Tand 5.9 nm, respectively, are deduced from the resistivity data at differentapplied magnetic fields. The critical current density is Jc= 1.5 10^5 A/cm2 at3 K. This technique can be used as a template-free fabrication method forsuperconducting devices.
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