Magnetic properties, relaxation, and quantum tunneling in CoFe2O4 nanoparticles embedded in potassium silicate

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RECERCAT Home > Universitat de Barcelona > Física de la Matèria Condensada > Articles publicats en revistes (Física de la Matèria Condensada) > View document

To access the full text documents, please follow this link: http://hdl.handle.net/2445/10657

dc.contributor	Universitat de Barcelona
dc.contributor.author	Zhang, Xixiang
dc.contributor.author	Hernández Ferràs, Joan Manel
dc.contributor.author	Tejada Palacios, Javier
dc.contributor.author	Ziolo, R. F.
dc.date	2009-12-29T11:27:05Z
dc.date	2009-12-29T11:27:05Z
dc.date	1996
dc.identifier.citation	0163-1829
dc.identifier.citation	117652
dc.identifier.uri	http://hdl.handle.net/2445/10657
dc.format	6 p.
dc.format	application/pdf
dc.language.iso	eng
dc.publisher	The American Physical Society
dc.relation	Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.4101
dc.relation	Physical Review B, 1996, vol. 54, núm. 6, p. 4101-4106
dc.relation	http://dx.doi.org/10.1103/PhysRevB.54.4101
dc.rights	(c) The American Physical Society, 1996
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Materials magnètics
dc.subject	Propietats magnètiques
dc.subject	Magnetic materials
dc.subject	Magnetic properties
dc.title	Magnetic properties, relaxation, and quantum tunneling in CoFe2O4 nanoparticles embedded in potassium silicate
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.description.abstract	We report magnetic properties and magnetic relaxation phenomena in a sample comprised of nanocrystalline CoFe2O4 ~;97%!1g-Fe2O3 ~;3%! and polymer in potassium silicate ~as magnetic glass! nanoparticle systems in which two very different barrier distributions contributed to the relaxation behavior. We have demonstrated experimentally that only energy barrier distributions and the thermal activation process could not account for a plateau in the viscosity data at low temperatures. Quantum tunneling of magnetization is suggested below ;3 K.

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