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

Journal Article · Sun Feb 15 04:00:00 EST 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4914019· OSTI ID:22454463

Zhang, Chen; Wang, Da; Liu, Zheng-Hao; Zhang, Yan; Ma, Ping; Feng, Qing-Rong; Wang, Yue; Gan, Zi-Zhao ^[1]

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1. Applied Superconductivity Center and State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)

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.

• OSTI ID: 22454463
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 2 Vol. 5; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

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