Magnetic resonance of Fe3O4 nanoparticles with their different amount in the ensemble

Abstract

Ferromagnetic resonance was studied using magnetite nanoparticles (Fe3O4) obtained by cryochemical synthesis. The initial nanoparticle suspension was prepared in butyl alcohol and subsequently diluted to achieve different Fe3O4 concentrations. The resonance line width, the area under the resonance absorption line, absorption intensity and the value of the resonant magnetic field at a fixed frequency were determined. A quadratic dependence of the dipole-di-pole interaction on the change in the total mass of magnetic nanoparticles in the ensemble was established. The value of the effective magnetic field was determined.