Increasing the sensor performance using Au modified high temperature superconducting YBa2Cu3O7-δ thin films

11th European Conference on Applied Superconductivity

Katzer, C.^1 ; Stahl, C.^2 ; Michalowski, P.^1 ; Treiber, S.^2 ; Westerhausen, M.^1 ; Schmidl, F.^1 ; Seidel, P.^1 ; Schütz, G.^2 ; Albrecht, J.^3

Institute of Solid State Physics, Friedrich-Schiller University Jena, Helmholtzweg 5, Jena

D-07743, Germany^1

Max-Planck-Institute of Intelligent Systems, Heisenbergstraße 3, Stuttgart

D-70569, Germany^2

Aalen University, Beethovenstraße 1, Aalen

D-73430, Germany^3

关键词: Antenna structures;    Au particles;    Flux noise;    High temperature superconducting;    Low frequency range;    Sensor device;    Sensor performance;    Superconducting sensors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012024/pdf
DOI  :  10.1088/1742-6596/507/1/012024

来源: IOP

【 摘 要 】

We prepared planar, galvanically coupled gradiometers whereby the antenna structures of some of them were modified by incorporating Au nanoparticles. Gradiometers with gold modified antennas were compared with conventional ones to investigate the influence of gold induced pinning on the performance of superconducting sensor devices. We found that a local inclusion of gold nanoparticles offers the possibility of increasing the pinning of flux lines in the antenna regions, thus significantly reducing flux noise, especially in the low-frequency range. Since also the properties of grain boundary Josephson Junctions are strongly affected by Au particles, SQUID and antenna regions in gradiometric sensor devices can be separately optimized.