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ADILLON ALBERO POL_4253603_assignsubmission_file_TFG-Adillon-Albero-Pol.pdf (2.15 MB)

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Bachelor thesis

Publication date

2021-07

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cc-by-nc-nd (c) Adillon, 2021
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/180594

Magnetic nanoparticles with inhomogeneous and core/shell structures

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Abstract

In this work, we present the results of atomistic-level simulations of the magnetic properties of individual magnetic nanoparticles (NP) with a variety of morphologies and compo-sitions. For this purpose, we have set up a computer code that uses the Monte Carlo method to simulate Heisenberg classical spins residing on the nodes of different kinds of 3D lattices, includ-ing exchange interactions between them, magnetocrystalline uniaxial anisotropy, and the effect of an external magnetic field. Finite-size and surface effects on the equilibrium magnetic configu-rations and hysteresis loops of single-phase NP have been studied varying the shape and surface anisotropy of the NP. We also present results of the reversal mechanisms of NP with (ferromag-netic (FM)/antiferromagnetic(AF)) core/shell morphology, showing that they exhibit the exchange bias (EB) phenomenon in the hysteresis loops after a field cooling (FC) process and unveiling the microscopic origin of this phenomenon. Finally, the possibility of observing EB effects in NP with inverted core(AF)/shell(FM) structure will be explored and their magnetic properties compared to those with the conventional morphology

Description

Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2021, Tutor: Òscar Iglesias Clotas

Subject

Nanopartícules magnètiques, Mètode de Montecarlo, Treballs de fi de grau

Subject (English)

Magnetic nanoparticles, Monte Carlo method, Bachelor's theses

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Treballs Finals de Grau (TFG) - Física

Citation

ADILLON ALBERO, Pol. Magnetic nanoparticles with inhomogeneous and core/shell structures. [consulted: 10 of August of 2026]. Available at: https://hdl.handle.net/2445/180594

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