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YBCO Nanobridges: Simplified Fabrication Process by Using a Ti Hard Mask

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9 Author(s)
G. Papari ; Coherentia-INFM-CNR, Univ. Degli Studi di Napoli Federico II, Naples, Italy ; Franco Carillo ; Detlef Born ; L. Bartoloni
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An innovative fabrication procedure has been developed to obtain YBa2Cu3O7-x (YBCO) nanobridges from c-axis oriented films. The novelty regards the use of a thin titanium mask used in the patterning process. The use of the Ti makes simpler the fabrication procedure guaranteeing high quality devices, as demonstrated by transport measurements. Critical temperatures and critical current densities scale with the width of the microbridge down to 200 nm in agreement with most results available in literature. The actual properties of the devices, performances, yield and reproducibility, along with an accurate control on doping, may allow the use of these micro-bridges for nanoscale experiments.

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IEEE Transactions on Applied Superconductivity  (Volume:19 ,  Issue: 3 )