Artículo
Spin-lattice dynamics of surface vs core magnetization in Fe nanoparticles
Dos Santos Mendez, Gonzalo Joaquín
; Meyer, Robert; Aparicio, Romina Marcela
; Tranchida, Julien; Bringa, Eduardo Marcial
; Urbassek, Herbert M.
Fecha de publicación:
07/2021
Editorial:
American Institute of Physics
Revista:
Applied Physics Letters
ISSN:
0003-6951
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Magnetization of clusters is often simulated using atomistic spin dynamics for a fixed lattice. Coupled spin-lattice dynamics simulations of the magnetization of nanoparticles have, to date, neglected the change in the size of the atomic magnetic moments near surfaces. We show that the introduction of variable magnetic moments leads to a better description of experimental data for the magnetization of small Fe nanoparticles. To this end, we divide atoms into a surface-near shell and a core with bulk properties. It is demonstrated that both the magnitude of the shell magnetic moment and the exchange interactions need to be modified to obtain a fair representation of the experimental data. This allows for a reasonable description of the average magnetic moment vs cluster size, and also the cluster magnetization vs temperature.
Palabras clave:
MOLECULAR DYNAMICS
,
SPIN DYNAMICS
,
NANOPARTICLES
,
MAGNETIZATION
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Colecciones
Articulos(CCT - MENDOZA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Citación
Dos Santos Mendez, Gonzalo Joaquín; Meyer, Robert; Aparicio, Romina Marcela; Tranchida, Julien; Bringa, Eduardo Marcial; et al.; Spin-lattice dynamics of surface vs core magnetization in Fe nanoparticles; American Institute of Physics; Applied Physics Letters; 119; 1; 7-2021; 1-12
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