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Effect of the Sign of Anisotropy Constants on the Properties of the System of Interacting Ferromagnetic Nanoparticles

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Sadek M., Marchwiany M., Woinska M., Majhofer A., Gosk J., Twardowski A., Szczytko J.

Acta Physica Polonica A

2016

vol. 129

issue 1a

A-53-A-55

We use the Monte Carlo simulation method to investigate the influence of the signs of magnetocrystalline anisotropy constants and the magnetic dipole-dipole interactions on the zero field cooled-field cooled magnetization experiments and hysteresis curves of a system of magnetic nanoparticles. Positive first cubic anisotropy constant K₁ results in larger blocking temperatures and larger coercive fields of a system, while the second anisotropy constant K₂ is practically of negligible importance for the phenomena investigated. Magnetic dipole-dipole interactions are important only in the most dense systems of particles and their effects practically disappear for systems where the distance between the closest particles exceeds three particle diameters.

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1 Acta Physica Polonica A

1 2016

1 Gosk J.

1 Majhofer A.

1 Marchwiany M.

1 Sadek M.

1 Szczytko J.

1 Twardowski A.

1 Woinska M.

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Effect of the Sign of Anisotropy Constants on the Properties of the System of Interacting Ferromagnetic Nanoparticles