|
The magnetic sensor, constructed of bulk Bi-Pb-Sr-Ca-Cu-O(BPSCCO),was fabricated by use of the shock compaction method,employing a propellant gun-system, and then sintered under through use of an electronic furnace. The specimen as the magnetic sensor was maintained in the superconducting state at 77.4K, under the current density of approximately 40 A/cm2 in the absence of an excitation magnetic field. The superconducting state was then broken and the specimen exposed to the value of 40x10-4 T. That is, the resistance of the specimen occurred when exposed to 40x10-4 T under the constant J of 40 A/cm2. The magnetic sensitivity of the specimen was approximately 13%/(10-4T) over the range of measurement of the magnetic field from 0 to ±5x10-4 T,under a constant 40x10-4 T for the value of, being approximately 13 times greater than that of a giant magnetoresistance sensor. |