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http://hdl.handle.net/2445/180594
Title: | Magnetic nanoparticles with inhomogeneous and core/shell structures |
Author: | Adillon Albero, Pol |
Director/Tutor: | Iglesias, Òscar |
Keywords: | Nanopartícules magnètiques Mètode de Montecarlo Treballs de fi de grau Magnetic nanoparticles Monte Carlo method Bachelor's theses |
Issue Date: | Jul-2021 |
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 |
Note: | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2021, Tutor: Òscar Iglesias Clotas |
URI: | http://hdl.handle.net/2445/180594 |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
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ADILLON ALBERO POL_4253603_assignsubmission_file_TFG-Adillon-Albero-Pol.pdf | 2.2 MB | Adobe PDF | View/Open |
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