Dresden 2017 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 55: Poster Session: Superconductivity 2
TT 55.13: Poster
Wednesday, March 22, 2017, 15:00–19:00, P2-OG3
YBa2Cu3O7 nanoSQUIDs for scanning SQUID microscopy — •Katja Wurster, Benedikt Müller, Jianxin Lin, Reinhold Kleiner, and Dieter Koelle — Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Germany
The minuaturization of SQUID structures down to the sub-micron scale (nanoSQUIDs) is highly promising for their application in high-resolution scanning SQUID microscopy (SSM). Following recent achievements with nanoSQUIDs from conventional metallic superconductors, we are developing nanoSQUIDs based on the cuprate superconductor YBa2Cu3O7 (YBCO) for SSM. We present here our efforts to develop YBCO nanoSQUIDs based on grain boundary Josepshon junctions, grown on bicrystal SrTiO3 substrates. These SQUIDs have to be fabricated on structures wich are suitable for implementation of their use in SSM. This includes in particular the development of structures which allow for the approach of the YBCO nanoSQUIDs to very small distances from the sample surfaces to be investigated. The use of YBCO offers operation over a wide range of temperature and magnetic field, which can significantly enhance the range of application of nanoSQUIDs for SSM-based nanoscale magnetic sensing and thermometry.
Technical support by R. Löffler and M. Turad from LISA+ is gratefully acknowledged.