DIGITAL INDUCTION FERROMETER FOR RECORDING HYSTERESIS LOOPS OF THIN FERROMAGNETIC FILMS Russian patent published in 2024 - IPC G01R33/14 

FIELD: measuring equipment.

SUBSTANCE: intended for recording hysteresis loops of thin ferromagnetic films. At the output of the synchronous detector, between the reference and measured signals, a first-order active phase filter is installed, the input of which is connected through a reference signal amplifier to an external reference oscillator, and the output of the first-order active phase filter is connected through an amplifier to Helmholtz rings connected in series with a current-measuring resistor to input of the analog-to-digital converter, while the magnetization reversal field H is directed in the plane of the measuring table and the magnetically sensitive transducer, consisting of two coils, the windings of which are connected counter-currently and located in the same plane, and the measuring table is located above the coils of the magnetically sensitive transducer in such a way that the plane of the measuring table orthogonal to the axes of the coils of the magnetically sensitive transducer.

EFFECT: increased sensitivity.

1 cl, 3 dwg