Equilibrium magnetic properties of dipolar interacting ferromagnetic nanoparticles |
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Authors: | Zhongquan Mao Dihu ChenZhenhui He |
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Affiliation: | State Key Laboratory of Optoelectronic Materials and Technologies, and Physics department of School of Physics and Engineering, Sun Yet-sen University, Guangzhou 510275, PR China |
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Abstract: | We use Monte Carlo simulations to study the influence of dipolar interaction on the equilibrium magnetic properties of monodisperse single-domain ferromagnetic nanoparticles. Low field magnetizations simulated in zero field cooling (ZFC)/field cooling (FC) procedures and field-dependent magnetization curves above the blocking temperatures show strong dependence on the concentration and the spatial arrangement (cubic or random) of the magnetic particles. The field-dependent magnetizations can not be simply described by the T* model at relative low temperatures due to the interplay between anisotropy and dipolar interactions, as well as the spatial arrangement effect. |
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Keywords: | 75.75.+a 75.60.Ej 75.20.&minus g |
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