High critical-current density and scaling of phase-slip processes in YBaCuO nanowires

Details High critical-current density and scaling of phase-slip processes in YBaCuO nanowires High critical-current density and scaling of phase-slip processes in YBaCuO nanowires

2012-01-09

arxiv.org/abs/1201.1886v1

Physics

Condensed Matter

Superconductivity

8 pages, 3 figures. Accepted for publication in Superconductor Science and Technology

Scientific paper

YBaCuO nanowires were reproducibly fabricated down to widths of 50 nm. A Au/Ti cap layer on YBCO yielded high electrical performance up to temperatures above 80 K in single nanowires. Critical current density of tens of MA/cm2 at T = 4.2 K and of 10 MA/cm2 at 77 K were achieved that survive in high magnetic fields. Phase-slip processes were tuned by choosing the size of the nanochannels and the intensity of the applied external magnetic field. Data indicate that YBCO nanowires are rather attractive system for the fabrication of efficient sensors, supporting the notion of futuristic THz devices.

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