First experimental investigations on a thin film Hall magnetometer with a high temperature superconducting pick-up antenna

First experimental investigations were performed on an integrated hybrid magnetometer, consisting of a thin film high-T-c superconducting magnetic pick-up system and a Hall detector made of bismuth. Sensitivity measurements in the temperature range between 70 and 300 K were performed. We found a steep increase of the sensitivity by a factor of about 100 below the transition temperature of the pick-up system as expected from calculation of its field amplification. At a temperature of 77 K we measured a resolution of 8 pT/root Hz in the white noise range. (C) 1998 Elsevier Science Ltd. All rights reserved.