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dc.contributor.author
Lima, Enio Junior  
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Torres, T. E.  
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Rossi, L. M.  
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Rechenberg, R.  
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Berquo, T. S.  
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Ibarra, A.  
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Marquina, C.  
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Ibarra, R. M.  
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Goya, G. F.  
dc.date.available
2017-06-08T21:17:34Z  
dc.date.issued
2013-05  
dc.identifier.citation
Lima, Enio Junior; Torres, T. E.; Rossi, L. M.; Rechenberg, R.; Berquo, T. S.; et al.; Size dependence of the magnetic relaxation and specific power absorption in iron oxide nanoparticles; Springer; Journal Of Nanoparticle Research; 15; 5; 5-2013; 1654-1655  
dc.identifier.issn
1388-0764  
dc.identifier.uri
http://hdl.handle.net/11336/17837  
dc.description.abstract
We report on the magnetic and power absorption properties of a series of iron oxide nanoparticles with average sizes <d> ranging from 3 to 23 nm, prepared by thermal decomposition of Iron(III) acetylacetonate in organic media. From the careful characterization of the magnetic and physicochemical properties of these samples, we were able to reproduce the specific power absorption (SPA) values experimentally found, as well as their dependence with particle size, using a simple model of Brownian and Neel Relaxation at ´ room temperature. SPA experiments in ac magnetic fields (0 = 13 kA/m and f = 250 kHz) indicated that the magnetic and rheological properties played the fundamental rule to determine the heating efficiency at different conditions. A maximum SPA value of 344 W/g was obtained for a sample containing nanoparticles with <d> = 12 nm and dispersion σ = 0.25. The observed SPA dependence with particle diameter and their magnetic parameters indicated that, for the size range and experimental conditions of f and H studied in this work, both Neel and Brown relaxation mechanisms are important to the heat generation observed.  
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application/pdf  
dc.language.iso
eng  
dc.publisher
Springer  
dc.rights
info:eu-repo/semantics/restrictedAccess  
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Magnetic Nanoparticles  
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Magnetic Losses  
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Superparamagnetism  
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Electromagnetic Heating  
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Física de los Materiales Condensados  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Size dependence of the magnetic relaxation and specific power absorption in iron oxide nanoparticles  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2015-10-15T20:00:32Z  
dc.identifier.eissn
1572-896X  
dc.journal.volume
15  
dc.journal.number
5  
dc.journal.pagination
1654-1655  
dc.journal.pais
Alemania  
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Berlin  
dc.description.fil
Fil: Lima, Enio Junior. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
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Fil: Torres, T. E.. Universidad de Zaragoza; España  
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Fil: Rossi, L. M.. Universidade de Sao Paulo; Brasil  
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Fil: Rechenberg, R.. Universidade de Sao Paulo; Brasil  
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Fil: Berquo, T. S.. University Of Minnesota; Estados Unidos  
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Fil: Ibarra, A.. Universidad de Zaragoza; España  
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Fil: Marquina, C.. Universidad de Zaragoza; España  
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Fil: Ibarra, R. M.. Universidad de Zaragoza; España  
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Fil: Goya, G. F.. Universidad de Zaragoza; España  
dc.journal.title
Journal Of Nanoparticle Research  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11051-013-1654-x  
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info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11051-013-1654-x