skip to main content

Title: Fabrication of superconducting nanowires from ultrathin MgB{sub 2} films via focused ion beam milling

High quality superconducting nanowires were fabricated from ultrathin MgB{sub 2} films by a focused ion beam milling technique. The precursor MgB{sub 2} films in 10 nm thick were grown on MgO substrates by using a hybrid physical-chemical vapor deposition method. The nanowires, in widths of about 300-600 nm and lengths of 1 or 10 μm, showed high superconducting critical temperatures (T{sub c}’s) above 34 K and narrow superconducting transition widths (ΔT{sub c}’s) of 1-3 K. The superconducting critical current density J{sub c} of the nanowires was above 5 × 10{sup 7} A/cm{sup 2} at 20 K. The high T{sub c}, narrow ΔT{sub c}, and high J{sub c} of the nanowires offered the possibility of making MgB{sub 2}-based nano-devices such as hot-electron bolometers and superconducting nanowire single-photon detectors with high operating temperatures at 15-20 K.
Authors:
; ; ; ; ; ; ;  [1]
  1. Applied Superconductivity Center and State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22454463
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 2; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHEMICAL VAPOR DEPOSITION; CRITICAL CURRENT; CRITICAL TEMPERATURE; CURRENT DENSITY; ELECTRONS; EQUIPMENT; FILMS; HYBRIDIZATION; ION BEAMS; MAGNESIUM BORIDES; MAGNESIUM OXIDES; MILLING; NANOWIRES; PHOTONS; PRECURSOR; SUBSTRATES