METHOD TO DETERMINE MAGNETISATION OF SATURATION OF MAGNETIC FLUID Russian patent published in 2015 - IPC G01R33/12 

FIELD: instrumentation.

SUBSTANCE: use: to determine magnetisation of saturation of a magnetic fluid. The substance of the invention consists in the fact that fluid is placed into the outer magnetic field, induction of which may be varied, they measure intensity H and induction B of the magnetic field inside the fluid, and they determine magnetisation of fluid M=(B/µ_o)-H, at the same time they determine magnetisation M=M₁ at B=B₁ at the initial section of the magnetisation curve, where the Curie law is met, they determine magnetisation M=M₂ at higher induction B=B₂ at the section of the magnetisation curve, where the Curie law is not met, from the equation (M₂B₁/M₁B₂)=3La(ξ₂)/ξ₂ they find the Langevin function La(ξ₂), then determine M_sat=M₂/La(ξ₂).

EFFECT: provision of possibility to determine magnetisation of saturation of magnetic fluid by two values of magnetisation in a weak field.

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