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Coercivity reduction in a two-dimensional array of nano-particles

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Abstract

We report on theoretical investigation of the magnetization reversal in two-dimensional arrays of ferromagnetic nano-particles with parameters of cobalt. The system was optimized for achieving the lowest coercivity in an array of particles located in the nodes of triangular, hexagonal and square grids. Based on the numerical solution of the non-stochastic Landau-Lifshitz-Gilbert equation we show that each particle distribution type is characterized with a proper optimal distance, allowing to lower the coercivity values for approximately 30% compared with the reference value obtained for a single nano-particle. It was shown that the reduction of coercivity occurs even if the particle position in the array is not very precise. In particular, the triangular particle arrangement maintained the same optimal distance between the particles under up to 20% random displacements of their position within the array.

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Authors and Affiliations

  1. Centro de Investigación en Materiales Avanzados, S.C. (CIMAV), Chihuahua/Monterrey, 31109, Chihuahua, Mexico

    Michel Morales-Meza, Paul P. Horley & Alexander Sukhov

  2. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06120, Halle (Saale), Germany

    Alexander Sukhov & Jamal Berakdar

Authors
  1. Michel Morales-Meza
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  2. Paul P. Horley
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  3. Alexander Sukhov
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  4. Jamal Berakdar
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Correspondence to Alexander Sukhov.

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Morales-Meza, M., Horley, P., Sukhov, A. et al. Coercivity reduction in a two-dimensional array of nano-particles. Eur. Phys. J. B 87, 186 (2014). https://doi.org/10.1140/epjb/e2014-50311-2

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