Fabrication of high-temperature superconducting nanobridges using atomic force microscopy

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dc.contributor.advisor Perold, W. J.
dc.contributor.advisor Meincken, M.
dc.contributor.author Elkaseh, Akram Abdulsalam en_ZA
dc.contributor.other University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.
dc.date.accessioned 2008-07-08T13:05:50Z en_ZA
dc.date.accessioned 2010-07-09T11:07:47Z
dc.date.available 2008-07-08T13:05:50Z en_ZA
dc.date.available 2010-07-09T11:07:47Z
dc.date.issued 2006-12 en_ZA
dc.identifier.uri http://hdl.handle.net/10019.1/3324
dc.description Thesis (MEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006.
dc.description.abstract The Josephson effect of high-temperature superconducting nanobridge structures is studied worldwide. Until now, nanobridges are generally fabricated with focused ion beam milling on planar thin films. These nanobridges are employed as weak links in superconducting quantum interference devices (SQUIDs) and used in superconducting flux flow transistors and devices. This project had two main objectives: to improve the sidewall angle of photoresist lines, with the aid of atomic force microscopy (AFM) nanolithography; and to fabricate hightemperature Josephson junctions by constricting superconductive YBCO lines on MgO substrates with AFM nanolithography. The entire fabrication process is explained including photolithography, deposition of the YBCO thin films with pulsed laser deposition (PLD), nanolithography and wet etching. Although the testing of the junctions did not show any Josephson behaviour, it could be demonstrated that nanobridge structures can successfully be created by AFM nanolithography. The entire fabrication process has been demonstrated in detail for the benefit of future research. en_ZA
dc.language.iso en en_ZA
dc.publisher Stellenbosch : University of Stellenbosch
dc.subject Atomic force microscopy en
dc.subject Superconductivity en
dc.subject Josephson effect en
dc.subject Pulsed laser deposition en
dc.subject Dissertations -- Electronic engineering en
dc.subject Theses -- Electronic engineering en
dc.title Fabrication of high-temperature superconducting nanobridges using atomic force microscopy en_ZA
dc.type Thesis en_ZA
dc.rights.holder University of Stellenbosch
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