The discreteness of magnetic moments of single-domain ferromagnetic nanoparticles

The linear character of IR spectra of magnetic liquid in a magnetic field showed that magnetic moment P values of single-domain ferromagnetic nanoparticles are discrete. Using the distance between lines of spectra, that have been got under magnetic induction values of 0.08 and 0.03 T, magnetic moment’s discrete steps were determined. Their values are: Δ P = 0.66·10-19 QUOTE and 0.97·10-19 A·m2 QUOTE . It was suggested, that discreteness P has been caused by quantification of nanoparticle from magnetic flow Φ. Supposing that nanoparticle’s link between P and Φ is similar to solenoid’s: Φ = ( P µ 0 / L ), where L - solenoid’s length, the effective length of magnetic flow’s quant is: Lf = (∆ P µ 0 / f ) ≈ a 0, where f = 2·10-15 Wb QUOTE - quant of magnetic flow, a 0 ≈ ≈ 0.5·10-10 m QUOTE - Bohr radius. The less the induction of field is, the more quant’s length is.