Measurements of ultra-low DC fields by high- T c superconducting cores: The effect of calcination temperature

Physical and Mechanical Properties of B2O3 doped YBaCuO Superconductors: Applicability as a Low DC Magnetometer

“…M at 77 K) is proportional with the trapped field or the pinning force of the studied samples. If the difference is large it indicates high pinning force and high critical current density [6].…”

Design and performance analysis of three superconducting magnetic sensors for the measurement of small fields

“…The driving coil, which was used to apply an ac magnetic field to the superconductor, has 50 turns cm −1 (wire diameter is 200 μm) and the winding changes direction in the middle of the spool (to reset the interaction between these two coils). The electronics (filters, etc) and test conditions of the magnetic sensors were also explained in [18].…”

“…The influence of inherent properties of superconducting (SC) cores (such as T c , the transition width, critical field, grain couplings and relative permeability of the SC cores) on the sensor performance has not been investigated. In our recent study many different parameters, such as the coil configuration, environmental conditions, sensor geometry and the strength of grain couplings, have been improved and the effects of those parameters on the sensor's sensitivity have been reported [16][17][18]. As a result of these experiments we, for instance, reached a judgment that stronger grain couplings provide a better dcfield sensitivity down to 1 nT.…”