Simulation of the electron spin resonance peak shape for magnetic nanopowder formed by particles of different diameters

Results of simulation of shape of the electron spin resonance absorption peak for magnetic nanopowder are presented. The influence of magnetic particle diameter on the shape and on width of the resonance peak is shown. The role of internal magnetic anisotropy field is under discussion. The simulation results show a good agreement with the experimental data of the electron spin resonance absorption in a) Fe3O4_Triton, b) Fe3O4_Crio, nanopowder and the data of its X-ray analysis.