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Micromagnetics study of the magnetic nano-granular films

Jiang Jian-Jun Yuan Lin Deng Lian-Wen He Hua-Hui

Micromagnetics study of the magnetic nano-granular films

Jiang Jian-Jun, Yuan Lin, Deng Lian-Wen, He Hua-Hui
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  • Abstract views:  4400
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  • Received Date:  21 December 2005
  • Accepted Date:  04 January 2006
  • Published Online:  20 June 2006

Micromagnetics study of the magnetic nano-granular films

  • 1. 华中科技大学电子科学与技术系,武汉 430074

Abstract: The nano-granular magnetic films were investigated using the micromagnetics method in this paper. The nano-granular magnetic film model studied consisted of an aggregate of 122 spherical nano-granules with an fcc structure. The computational results showed that the effect of the dipolar interaction of the system on the static magnetic structure is remarkable, while the effect of exchange interaction is indistinc. The frequency dependent permeability spectra of granular films with different volume ratio of magnetic components were simulated and the percolation phenomena of nanostructural magnetic films were extensively analyzed. Thus, the percolation threshold of the system studied was obtained according to the effective medium theory. Furthermore, the design of nano-granular magnetic films with large magnetic losses were carried out.

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