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Thermally-induced self-assembling nanotechnology of gold nano-dots on CeO2-buffered sapphire for superconducting films

A. CRISAN1,2,* , R. WÖRDENWEBER3, E. HOLLMANN3, R. KUTZNER3, T. W. BUTTON1, J. S. ABELL1

Affiliation

  1. Department of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom
  2. National Institute of Materials Physics, Bucharest, 077125 Romania
  3. Institute of Thin Films and Interfaces, Research Centre Jülich, Germany

Abstract

A typical facility for fabrication of devices based on high temperature superconducting (HTS) films grown on the lessexpensive CeO2-buffered sapphire substrates comprises a transfer chamber, a chamber for CeO2 growth, a chamber for YBa2Cu3Oy (YBCO) growth, and a chamber for Au deposition at room temperature. Here we present the adaptation of our previously-reported method to create artificial pinning centres in HTS films through self-assembled nano-scale islands for this type of facility without making any modifications. We succeeded to grow Au nano-dots from an ultra-thin layer of Au grown at room temperature subsequently annealed in the chamber for YBCO deposition, in the same conditions as for YBCO growth. AFM and RBS were used to investigate the formation of Au nano-dots, while XRD and susceptibility measurements were used to study the properties of nano-structured YBCO films..

Keywords

Applied superconductivity, YBCO thin films, Self-assembling nanotechnology, Au nano-dots.

Submitted at: April 23, 2008
Accepted at: June 9, 2008

Citation

A. CRISAN, R. WÖRDENWEBER, E. HOLLMANN, R. KUTZNER, T. W. BUTTON, J. S. ABELL, Thermally-induced self-assembling nanotechnology of gold nano-dots on CeO2-buffered sapphire for superconducting films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 6, pp. 1370-1373 (2008)