Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles

Fil: Moreno, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.

Guardado en:
Detalles Bibliográficos
Autores principales: Moreno, Roberto, Jenkins, Sarah, Williams, Wyn, Evans, Richard F. L.
Otros Autores: https://orcid.org/0000-0002-9799-4210
Formato: submittedVersion article
Lenguaje:Inglés
Publicado: 2024
Materias:
Arrhenius law
Transition time
Equilibrium states
Thermal activation
Acceso en línea:http://hdl.handle.net/11086/554105
https://arxiv.org/abs/2401.12080
https://doi.org/10.48550/arXiv.2401.12080
Aporte de:
Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba
id I10-R141-11086-554105
record_format dspace
spelling I10-R141-11086-5541052024-10-30T06:38:20Z Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles Moreno, Roberto Jenkins, Sarah Williams, Wyn Evans, Richard F. L. https://orcid.org/0000-0002-9799-4210 https://orcid.org/0000-0002-6469-9928 https://orcid.org/0000-0001-9210-7574 https://orcid.org/0000-0002-2378-8203 Arrhenius law Transition time Equilibrium states Thermal activation info:eu-repo/semantics/submittedVersion Fil: Moreno, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Moreno, Roberto. University of Edinburgh. School of GeoSciences; United Kingdom. Fil: Moreno, Roberto. University of York. School of Physics, Engineering and Technology; United Kingdom. Fil: Jenkins, Sarah. University of York. School of Physics, Engineering and Technology; United Kingdom. Fil: Williams, Wyn. University of Edinburgh. School of GeoSciences; United Kingdom. Fil: Evans, Richard F. L. University of York. School of Physics, Engineering and Technology; United Kingdom. The Arrhenius law predicts the transition time between equilibrium states in physical systems due to thermal activation, with broad applications in material science, magnetic hyperthermia and paleomagnetism where it is used to estimate the transition time and thermal stability of assemblies of magnetic nanoparticles. Magnetite is a material of great importance in paleomagnetic studies and magnetic hyperthermia but existing estimates of the attempt frequency f0 vary by several orders of magnitude in the range 107−1013 Hz, leading to significant uncertainty in their relaxation rate. Here we present a dynamical method enabling full parameterization of the Arrhenius-Néel law using atomistic spin dynamics. We determine the temperature and volume dependence of the attempt frequency of magnetite nanoparticles with cubic anisotropy and find a value of f0=0.562±0.059 GHz at room temperature. For particles with enhanced anisotropy we find a significant increase in the attempt frequency and a strong temperature dependence suggesting an important role of anisotropy. The method is applicable to a wide range of dynamical systems where different states can be clearly identified and enables robust estimates of domain state stabilities, with particular importance in the rapidly developing field of micromagnetic analysis of paleomagnetic recordings where samples can be numerically reconstructed to provide a better understanding of geomagnetic recording fidelity over geological time scales. info:eu-repo/semantics/submittedVersion Fil: Moreno, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Moreno, Roberto. University of Edinburgh. School of GeoSciences; United Kingdom. Fil: Moreno, Roberto. University of York. School of Physics, Engineering and Technology; United Kingdom. Fil: Jenkins, Sarah. University of York. School of Physics, Engineering and Technology; United Kingdom. Fil: Williams, Wyn. University of Edinburgh. School of GeoSciences; United Kingdom. Fil: Evans, Richard F. L. University of York. School of Physics, Engineering and Technology; United Kingdom. 2024-10-29T19:39:37Z 2024-10-29T19:39:37Z 2024-01-22 article Moreno, R., Jenkins, S., Williams, W., & Evans, R. F. (2024). Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles. arXiv preprint arXiv:2401.12080. http://hdl.handle.net/11086/554105 https://arxiv.org/abs/2401.12080 https://doi.org/10.48550/arXiv.2401.12080 eng Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-141
collection Repositorio Digital Universitario (UNC)
language Inglés
topic Arrhenius law
Transition time
Equilibrium states
Thermal activation
spellingShingle Arrhenius law
Transition time
Equilibrium states
Thermal activation
Moreno, Roberto
Jenkins, Sarah
Williams, Wyn
Evans, Richard F. L.
Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
topic_facet Arrhenius law
Transition time
Equilibrium states
Thermal activation
description Fil: Moreno, Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina.
author2 https://orcid.org/0000-0002-9799-4210
author_facet https://orcid.org/0000-0002-9799-4210
Moreno, Roberto
Jenkins, Sarah
Williams, Wyn
Evans, Richard F. L.
format submittedVersion
article
author Moreno, Roberto
Jenkins, Sarah
Williams, Wyn
Evans, Richard F. L.
author_sort Moreno, Roberto
title Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
title_short Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
title_full Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
title_fullStr Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
title_full_unstemmed Atomistic calculation of the f0 attempt frequency in Fe3O4 magnetite nanoparticles
title_sort atomistic calculation of the f0 attempt frequency in fe3o4 magnetite nanoparticles
publishDate 2024
url http://hdl.handle.net/11086/554105
https://arxiv.org/abs/2401.12080
https://doi.org/10.48550/arXiv.2401.12080
work_keys_str_mv AT morenoroberto atomisticcalculationofthef0attemptfrequencyinfe3o4magnetitenanoparticles
AT jenkinssarah atomisticcalculationofthef0attemptfrequencyinfe3o4magnetitenanoparticles
AT williamswyn atomisticcalculationofthef0attemptfrequencyinfe3o4magnetitenanoparticles
AT evansrichardfl atomisticcalculationofthef0attemptfrequencyinfe3o4magnetitenanoparticles
_version_ 1824552258774237184

Ejemplares similares