Electromagnetic Properties of YBCO Ceramics
We present a fabrication of polarity sensing superconducting magnetometer of Wheatstone bridge type. Superconducting sensor was field cooled in the magnetic field of a 0.15T permanent magnet by placing near the N or S pole. Two variable resistors were used to balance the bridge circuit. Passing a current along the superconductor in a transverse magnetic field, a voltage develops between the ends as the current varied. The magnetic field dependence of the induced output voltage of the HTS magnetometer has been tested in the the 10−5 to 10−4T range by changing the distance between the pole of a permanent magnet to the S pole of the superconducting magnetometer. The positive voltage increased, when the S pole of the magnet approached the N pole of the sensor.
