Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly

A numerically solved two-level Stoner-Wohlfarth model with thermal agitation is used to simulate Zero Field Cooling (ZFC)–Field Cooling (FC) curves of monosize and polysize samples and to determine the best method for obtaining a representative blocking temperature T<sub>B</sub> value of...

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Autores principales: Bruvera, Ignacio Javier, Mendoza Zélis, Pedro, Calatayud, M. Pilar, Goya, Gerardo Fabián, Sánchez, Francisco Homero
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Física
Stoner-Wohlfarth model
Magnetic nanoparticles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124066
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124066
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Stoner-Wohlfarth model
Magnetic nanoparticles
spellingShingle Ciencias Exactas
Física
Stoner-Wohlfarth model
Magnetic nanoparticles
Bruvera, Ignacio Javier
Mendoza Zélis, Pedro
Calatayud, M. Pilar
Goya, Gerardo Fabián
Sánchez, Francisco Homero
Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
topic_facet Ciencias Exactas
Física
Stoner-Wohlfarth model
Magnetic nanoparticles
description A numerically solved two-level Stoner-Wohlfarth model with thermal agitation is used to simulate Zero Field Cooling (ZFC)–Field Cooling (FC) curves of monosize and polysize samples and to determine the best method for obtaining a representative blocking temperature T<sub>B</sub> value of polysize samples. The results confirm a technique based on the T derivative of the difference between ZFC and FC curves proposed by Micha et al. (the good) and demonstrate its relation with two alternative methods: the ZFC maximum (the bad) and the inflection point (the ugly). The derivative method is then applied to experimental data, obtaining the T<sub>B</sub> distribution of a polysize Fe<sub>3</sub>O<sub>4</sub> nanoparticle sample suspended in hexane with an excellent agreement with TEM characterization.
format Articulo
Articulo
author Bruvera, Ignacio Javier
Mendoza Zélis, Pedro
Calatayud, M. Pilar
Goya, Gerardo Fabián
Sánchez, Francisco Homero
author_facet Bruvera, Ignacio Javier
Mendoza Zélis, Pedro
Calatayud, M. Pilar
Goya, Gerardo Fabián
Sánchez, Francisco Homero
author_sort Bruvera, Ignacio Javier
title Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
title_short Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
title_full Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
title_fullStr Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
title_full_unstemmed Determination of the blocking temperature of magnetic nanoparticles : The good, the bad, and the ugly
title_sort determination of the blocking temperature of magnetic nanoparticles : the good, the bad, and the ugly
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/124066
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