Microscopic Models and Simulation of Core/Shell Magnetic Nanoparticles

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Abstract

The magnetic properties of different kinds of core/shell nanoparticles have been investigated by using Monte Carlo simulations with the purpose of studying different kinds of phenomena related to this new geometric model of magnetic nanoparticles. We have focused on the study of magnetization curves, shifted loops and coercive fields to reveal the contributions of core, interface, shell and surface to the magnetic behaviour of this kind of nanoparticles. First, we have focused in particles consisting of a ferromagnetic core andantiferromagnetic shell for which the values of microscopic parameters such as anisotropy constants and kind of anisotropy, exchange constants, applied field angle and shell geometry were tuned with the aim to find their influence on the macroscopic magnetic behaviour and to reproduce or explain the origin of some recent experimental findings. Secondly, we have performed simulations of more recently synthesized inverted nanoparticle consisting of an antiferromagnetic core and a ferromagnetic shell with the aim to understand the microscopic origin of the exchange bias phenomenon and related phenomenology reported in several recent experimental studies. Index Terms—Nanomagnetism, spintronics, exchange bias, core/shell nanoparticles

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Researchers should cite this work as follows:

  • cesar augusto diaz pomar (2017), "Microscopic Models and Simulation of Core/Shell Magnetic Nanoparticles," http://nanohub.org/resources/26869.

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