Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles

7 páginas, 5 figuras.-- PACS number(s): 75.30.Cr, 75.50.Ee, 75.60.Ej, 75.50.Tt.-- et al.

Detalles Bibliográficos
Autores: Silva, Nuno Joâo O., Amaral, Vitor S., Urtizberea, Ainhoa, Bustamante, R., Millán, Ángel, Palacio, Fernando
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/47575
Acceso en línea:http://hdl.handle.net/10261/47575
Access Level:acceso abierto
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spelling Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticlesSilva, Nuno Joâo O.Amaral, Vitor S.Urtizberea, AinhoaBustamante, R.Millán, ÁngelPalacio, Fernando7 páginas, 5 figuras.-- PACS number(s): 75.30.Cr, 75.50.Ee, 75.60.Ej, 75.50.Tt.-- et al.We show that the coercive field in ferritin and ferrihydrite depends on the maximum magnetic field in a hysteresis loop and that coercivity and loop shifts depend both on the maximum and cooling fields. In the case of ferritin, we show that the time dependence of the magnetization also depends on the maximum and previous cooling fields. This behavior is associated to changes in the intraparticle energy barriers imprinted by these fields. Accordingly, the dependence of the coercive and loop-shift fields with the maximum field in ferritin and ferrihydrite can be described within the frame of a uniform-rotation model considering a dependence of the energy barrier with the maximum and the cooling fields.Part of this work has been supported by EuroMagNET II under the EU Contract No. 228043. The financial support from FCT (Grant No. PTDC/FIS/105416/2008) is gratefully recognized. The Aveiro-Zaragoza collaboration has been supported by the Integrated Spanish-Portuguese Action under the Grant No. PT2009-0131. The Aveiro- Barcelona collaboration has been supported by the Integrated Spanish-Portuguese Action under the Grant No. AIB2010PT- 00099. The work in Zaragoza has been supported by the research GrantsNo.MAT2007-61621 and No.CONSOLIDER CSD2007-00010 from the Ministry of Education. Ò.I. and A.L. acknowledge funding of the Spanish MICINN through Grants No. MAT2009-08667 and No. CSD2006-00012, and Catalan DIUE through Project No. 2009SGR856. N.J.O.S. acknowledges CSIC for a I3P contract and FCT for Ciencia 2008 program, A.U. acknowledges the financial support provided by contract from the EC NoE MAGMANET, and R.B. acknowledges ICMA-CSIC for a JAE-predoc grant.Peer reviewedAmerican Physical Society201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/47575reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevB.84.104427info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/475752026-05-22T06:33:51Z
dc.title.none.fl_str_mv Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
title Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
spellingShingle Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
Silva, Nuno Joâo O.
title_short Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
title_full Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
title_fullStr Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
title_full_unstemmed Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
title_sort Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
dc.creator.none.fl_str_mv Silva, Nuno Joâo O.
Amaral, Vitor S.
Urtizberea, Ainhoa
Bustamante, R.
Millán, Ángel
Palacio, Fernando
author Silva, Nuno Joâo O.
author_facet Silva, Nuno Joâo O.
Amaral, Vitor S.
Urtizberea, Ainhoa
Bustamante, R.
Millán, Ángel
Palacio, Fernando
author_role author
author2 Amaral, Vitor S.
Urtizberea, Ainhoa
Bustamante, R.
Millán, Ángel
Palacio, Fernando
author2_role author
author
author
author
author
description 7 páginas, 5 figuras.-- PACS number(s): 75.30.Cr, 75.50.Ee, 75.60.Ej, 75.50.Tt.-- et al.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/47575
url http://hdl.handle.net/10261/47575
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevB.84.104427
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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