METHOD OF MEASURING MAGNETIC FIELD Russian patent published in 2019 - IPC G01R33/24 B82Y35/00 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment and method of measuring magnetic field. Method involves exposing a silicon carbide crystal which contains spin centers with a fundamental quadrupole spin state focused by laser radiation frequency-tuned by a radio-frequency electromagnetic field and a constant radio-frequency electromagnetic field. One of radiofrequency fields is modulated with low frequency. Luminescence intensity of the spin centers at different frequencies of the tunable radio-frequency field at different values of the external magnetic field is measured. Magnitudes of the luminescence intensity variation curves corresponding to different values of the external constant magnetic field are plotted based on the magnitudes of the frequencies of the bend point of the curve of the value of the magnetic field versus the inflection point frequency. Then, measurements are taken for the analysed sample and the frequency of the bending point of the luminescence intensity curve near the frequency of the constant radio-frequency field is determined. Magnitude of magnetic field created by analysed sample is determined by frequency of inflection point at calibration curve.

EFFECT: technical result consists in increase of sensitivity and accuracy of determination of magnetic fields.

20 cl, 2 dwg