Non-destructive evaluation of defects in ferromagnetic plates using a sensitive magnetic sensor based on second harmonic response of superconducting Bi1.6Pb0.4Sr4Ca2Cu3O10+δ pellet
Source abstract
Abstract
The characteristics of a magnetic sensor, based on the non-linear electromagnetic response of the weak links present in polycrystalline BPSCCO superconductor are reported. The second harmonic response of the sensor in an alternating magnetic field at 40 kHz and at 77 K being a strong linear function of low d.c. field is utilized for magnetic field sensing. The noise limited resolution of the sensor is found to be 3.16 x 10−9 T/√Hz forHa.c.= 16 G and frequency 40 kHz. The magnetic sensor has been applied for nondestructive detection of various types of flaws in ferromagnetic plates and also for detection of small magnetic inclusions in a non-magnetic matrix. Our results suggest that the 2f response based BPSCCO superconductive magnetometer has potential for its application in the area of non-destructive evaluation of defects in ferromagnetic materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Field Sensors Techniques · Non-Destructive Testing Techniques · Magnetic Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
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