A thin film HTSC-Hall magnetometer––development and application

Abstract We have investigated a thin film Hall sensor coupled with a high- T C superconducting antenna structure. Based on theoretical calculations and on a well developed thin film technology, magnetometers with different layouts were realized on SrTiO 3 and buffered silicon substrates. The best sensors on SrTiO 3 show a sensitivity of 2.4 V/T and a white noise level of 2–3 nV/√Hz at 77 K. Further, we present eddy-current measurements with the hybrid HTSC-Hall magnetometer in a non-destructive evaluation system.