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DEMAGNETIZATION CORRECTIONSHIP CURVE OF MAGNETIZATION ON MAGNETIC FIELD OF FERROMAGNETIC CYLINDRICAL SAMPLES BY THE SOLENOID METHOD
Release time:
2019-10-07
Source:
Www.fe2100.com
This paper introduces a technique under development, which can demagnetize the relationship curve of the magnetization intensity of the ferromagnetic cylindrical sample measured by the magnetic flux meter solenoid method to the external magnetic field, and become the relationship curve of the real magnetization intensity of the material to the magnetic field. Unlike the usual method of using one or two artificially specified demagnetization factor values, this technique uses an accurately calculated magnetometer demagnetization factor that varies with the differential susceptibility of each point of the modified curve.
AbstractA developed technology is introduced, which can demagnetize the relationship curve of the magnetization intensity measured by the magnetic flux meter solenoid method of the ferromagnetic cylinder sample to the external magnetic field, and become the relationship curve of the real magnetization intensity of the material to the magnetic field. Unlike the usual method of using one or two artificially specified demagnetization factor values, this technique uses an accurately calculated magnetometer demagnetization factor that varies with the differential susceptibility of each point of the modified curve. Thus, the correction results are unique for each curve for each sample. Because the traditional demagnetization factor can only be defined for paramagnetic samples, this technique will inevitably bring errors when it is applied to ferromagnetic samples. Experiments show that this is a system error that decreases with the increase of the length-diameter ratio of the cylinder, so as long as the length-diameter ratio is large enough, the error is very small. For semi-soft and semi-hard magnetic open circuit samples, this technology not only leads to the birth of another measurement method different from the current recommend magnetometer method, but also is expected to provide a standard sample for the former, solving the problem that the accuracy of the results is difficult to verify.
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