抄録
Here, we developed a robust HTS-SQUID magnetometer based on a bicrystal SrTiO3 substrate and single-layer YBa2Cu3O7-x film, aiming for a mobile magnetometer in an unshielded environment. The robustness in the unshielded environment was achieved by coverage of the SQUID magnetometer with another HTS cross-shaped film in a flip-chip configuration, and introduction of a mesh structure in both the magnetometer and the HTS film. The SQUID parameters in DC and AC fields, such as critical current 2Ic, resistance Rn/2, modulation depth Vpp and flux noise S∅1/2, were studied. The SQUID was rotated and moved in the environment using a robot-arm, resulting in stable operation during the motion at 20 mm/s with active magnetic shielding.
