Abstract
A sample of nano-particle Fe3O4 was synthesized usingcoprecipitation, and characterized by zero field cooling (ZFC) andfield cooling (FC) magnetic moments and the major hysteresis loops. Thedata are analysed within the framework of a generalized Preisach model,which provides an excellent description of the experimental data. Thesimulated results are in good agreement with the experimental data.Using the model, we obtain that the blocking temperature ofFe3O4 nano-particles with diameter of 8.4 nm is 105 K,and the interaction field distribution between the particles is 550 Oe.
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