As metrology extends toward the nanoscale, a number of potential applications and new challenges arise. By combining photolithography with focused ion beam and/or electron beam methods, superconducting quantum interference devices (SQUIDs) with loop dimensions down to 200 nm and superconducting bridge dimensions of the order 80 nm have been produced. These SQUIDs have a range of potential applications. As an illustration, we describe a method for characterizing the effective area and the magnetic penetration depth of a structured superconducting thin film in the extreme limit, where the superconducting penetration depth λ is much greater than the film thickness and is comparable with the lateral dimensions of the device.
|Number of pages||5|
|Journal||IEEE Transactions on Instrumentation and Measurement|
|Publication status||Published - Apr 2007|
- magnetic field effects
- superconducting devices
- thin films