Determination of the blocking temperature of magnetic nanoparticles: The good, the bad, and the ugly
Resumen: 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 TB 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 TB distribution of a polysize Fe3O4 nanoparticle sample suspended in hexane with an excellent agreement with TEM characterization.
Idioma: Inglés
DOI: 10.1063/1.4935484
Año: 2015
Publicado en: JOURNAL OF APPLIED PHYSICS 118, 18 (2015), 400382
ISSN: 0021-8979

Factor impacto JCR: 2.101 (2015)
Categ. JCR: PHYSICS, APPLIED rank: 47 / 144 = 0.326 (2015) - Q2 - T1
Factor impacto SCIMAGO:

Tipo y forma: Article (Published version)
Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)

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