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http://hdl.handle.net/2445/188636
Title: | Equilibrium magnetization configurations in helical magnets |
Author: | Garcés Ortiz, Ot |
Director/Tutor: | Iglesias, Òscar |
Keywords: | Nanoestructures Anisotropia Treballs de fi de grau Nanostructures Anisotropy Bachelor's theses |
Issue Date: | Jun-2022 |
Abstract: | We have taken an in-depth study of curvature effects on the magnetism of low dimensional nanostructures. We present a general theoretical framework based on a continuous approach to the micromagnetic relevant energy terms (exchange and anisotropy). The model shows that curvature induces effective anisotropy and Dzyaloshinskii-Moriya interactions that are not present in conventional cases. We have particularized the study to helical ferromagnetic helices, and found that they exhibit stable magnetization transitions between quasi-tangential to onion-like configurations. By performing atomistic Monte Carlo simulations, we have validated the theoretical framework and obtained a phase diagram of both phases. We have also performed MC simulations considering only dipolar interactions and found that abrupt magnetic ground state configuration transitions can be induced |
Note: | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2022, Tutor: Òscar Iglesias Clotas |
URI: | http://hdl.handle.net/2445/188636 |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
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GARCÉS ORTIZ OT_6057628_assignsubmission_file_TFG-Garces-Ortiz-Ot.pdf | 1.77 MB | Adobe PDF | View/Open |
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