In this work, we present the results obtained in fabrication and characterization of magnesium diboride nanowires realized by an electron beam lithography EBL-based method. For fabricating MgB2 thin films, an all in situ technique has been used, based on the coevaporation of B and Mg by means of an e-gun and a resistive heater, respectively. Since the high temperatures required for the fabrication of good quality MgB2 thin films do not allow the nanostructuring approach based on the lift-off technique, we structured the samples combining EBL, optical lithography, and Ar milling. In this way, reproducible nanowires 1 m long have been obtained. To illustrate the impact of the MgB2 film processing on its superconducting properties, we measured the temperature dependence of the resistance on a nanowire and compared it to the original magnesium diboride film. The electrical properties of the films are not degraded as a consequence of the nanostructuring process, so that superconducting nanodevices may be obtained by this method.

Fabrication of superconducting MgB2 nanostructures by an electron beam lithography-based technique / Portesi, Chiara; Borini, S; Amato, Giampiero; Monticone, Eugenio. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 99:6(2006), pp. 066115-1-066115-3. [10.1063/1.2183392]

Fabrication of superconducting MgB2 nanostructures by an electron beam lithography-based technique

PORTESI, CHIARA;AMATO, GIAMPIERO;MONTICONE, EUGENIO
2006

Abstract

In this work, we present the results obtained in fabrication and characterization of magnesium diboride nanowires realized by an electron beam lithography EBL-based method. For fabricating MgB2 thin films, an all in situ technique has been used, based on the coevaporation of B and Mg by means of an e-gun and a resistive heater, respectively. Since the high temperatures required for the fabrication of good quality MgB2 thin films do not allow the nanostructuring approach based on the lift-off technique, we structured the samples combining EBL, optical lithography, and Ar milling. In this way, reproducible nanowires 1 m long have been obtained. To illustrate the impact of the MgB2 film processing on its superconducting properties, we measured the temperature dependence of the resistance on a nanowire and compared it to the original magnesium diboride film. The electrical properties of the films are not degraded as a consequence of the nanostructuring process, so that superconducting nanodevices may be obtained by this method.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/31083
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