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Toward YBa2Cu3O7-δ nanoscale structures for hybrid devices

Reza Baghdadi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Riccardo Arpaia (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Thilo Bauch (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
IEEE transactions on applied superconductivity (1051-8223). Vol. 25 (2015), 3,
[Artikel, refereegranskad vetenskaplig]

An ex situ ozone annealing has been applied both on YBa2Cu3O7-d (YBCO) films and nanowires. From the investigation on bare films, by measuring the superconducting resistive transition in temperature and the X-ray diffraction pattern, we have observed that the ozonation can be a powerful tool to oxygenate the YBCO structure. To probe the effective role of this reactive annealing on nanostructures, we have fabricated nanowires with widths down to 100 nm, covered by a 20-nm-thick Au layer. We have compared the critical current density and the broadening of the resistance transition measured before and after the ozone treatment, concluding that the ozone is instrumental in recovering very high quality superconducting properties inside the nanostructures, which were degraded by the oxygen out-diffusion occurring during the nanopatterning.

Nyckelord: Capping layer, High-temperature superconductors, hybrid devices, nanofabrication, ozone treatment



Denna post skapades 2016-01-18. Senast ändrad 2016-09-14.
CPL Pubid: 230855

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Nanoteknik

Chalmers infrastruktur