Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure

Iron-oxide hollow nanospheres (HNS) may present unusual magnetic behavior as a consequence of their unique morphology. Here, we report the unusual magnetic behavior ofHNS that are 9 nmin diameter. The magnetic properties ofHNSoriginate in their complex magnetic structure, as evidenced by Mössbauer s...

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Authors: de Biasi, Emilio, Lima, Enio Junior, Vargas, Jose Marcelo, Zysler, Roberto Daniel, Arbiol, Jordi, Ibarra, Alfonso, Goya, Gerardo Fabian, Ibarra, Ricardo M.
Format: article
Status:Published version
Publication Date:2015
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/55302
Online Access:http://hdl.handle.net/11336/55302
Access Level:Open access
Keyword:Micromagnetism
Nanomagnetism
Nanoparticles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
id AR_a5e9255f7db7afc2fe8daa2f6fb2b043
oai_identifier_str oai:ri.conicet.gov.ar:11336/55302
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
title Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
spellingShingle Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
de Biasi, Emilio
Micromagnetism
Nanomagnetism
Nanoparticles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
title_full Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
title_fullStr Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
title_full_unstemmed Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
title_sort Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure
dc.creator.none.fl_str_mv de Biasi, Emilio
Lima, Enio Junior
Vargas, Jose Marcelo
Zysler, Roberto Daniel
Arbiol, Jordi
Ibarra, Alfonso
Goya, Gerardo Fabian
Ibarra, Ricardo M.
author de Biasi, Emilio
author_facet de Biasi, Emilio
Lima, Enio Junior
Vargas, Jose Marcelo
Zysler, Roberto Daniel
Arbiol, Jordi
Ibarra, Alfonso
Goya, Gerardo Fabian
Ibarra, Ricardo M.
author_role author
author2 Lima, Enio Junior
Vargas, Jose Marcelo
Zysler, Roberto Daniel
Arbiol, Jordi
Ibarra, Alfonso
Goya, Gerardo Fabian
Ibarra, Ricardo M.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Micromagnetism
Nanomagnetism
Nanoparticles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Micromagnetism
Nanomagnetism
Nanoparticles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description Iron-oxide hollow nanospheres (HNS) may present unusual magnetic behavior as a consequence of their unique morphology. Here, we report the unusual magnetic behavior ofHNS that are 9 nmin diameter. The magnetic properties ofHNSoriginate in their complex magnetic structure, as evidenced by Mössbauer spectroscopy and magnetization measurements.Weobserve a bias in the hysteresis when measured at very low temperature in the field cooling protocol (10 kOe). In addition, dc (static) and ac (dynamic) magnetization measurements against temperature and applied field reveal a frustrated order of the system below 10 K. High-resolution transmission electron microscopy (HRTEM) studies reveal that theHNSare composed of small crystalline clusters of about 2 nmin diameter, which behave as individual magnetic entities. Micromagnetic simulations (using conjugate gradient in order to minimize the total energy of the system) reproduce the experimentally observed magnetic behavior. The model considers the hollow particles as constituted by small ordered clusters embedded in an antiferromagnetic environment (spins localized outside the clusters). In addition, the surface spins (in both inner and outer surfaces of theHNS) are affected by a local surface anisotropy. The strong effective magnetic anisotropy field of the clusters induces the bias observed when the system is cooled in the presence of a magnetic external field. This effect propagates through the exchange interaction into the entire particle.
publishDate 2015
dc.date.none.fl_str_mv 2015-10-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/55302
de Biasi, Emilio; Lima, Enio Junior; Vargas, Jose Marcelo; Zysler, Roberto Daniel; Arbiol, Jordi; et al.; Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure; IOP Publishing; Materials Research Express; 2; 10; 5-10-2015; 105001/1-105001/11
2053-1591
CONICET Digital
CONICET
url http://hdl.handle.net/11336/55302
identifier_str_mv de Biasi, Emilio; Lima, Enio Junior; Vargas, Jose Marcelo; Zysler, Roberto Daniel; Arbiol, Jordi; et al.; Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure; IOP Publishing; Materials Research Express; 2; 10; 5-10-2015; 105001/1-105001/11
2053-1591
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.iopscience.iop.org/article/10.1088/2053-1591/2/10/105001/
info:eu-repo/semantics/altIdentifier/doi/10.1088/2053-1591/2/10/105001
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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spelling Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structurede Biasi, EmilioLima, Enio JuniorVargas, Jose MarceloZysler, Roberto DanielArbiol, JordiIbarra, AlfonsoGoya, Gerardo FabianIbarra, Ricardo M.MicromagnetismNanomagnetismNanoparticleshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Iron-oxide hollow nanospheres (HNS) may present unusual magnetic behavior as a consequence of their unique morphology. Here, we report the unusual magnetic behavior ofHNS that are 9 nmin diameter. The magnetic properties ofHNSoriginate in their complex magnetic structure, as evidenced by Mössbauer spectroscopy and magnetization measurements.Weobserve a bias in the hysteresis when measured at very low temperature in the field cooling protocol (10 kOe). In addition, dc (static) and ac (dynamic) magnetization measurements against temperature and applied field reveal a frustrated order of the system below 10 K. High-resolution transmission electron microscopy (HRTEM) studies reveal that theHNSare composed of small crystalline clusters of about 2 nmin diameter, which behave as individual magnetic entities. Micromagnetic simulations (using conjugate gradient in order to minimize the total energy of the system) reproduce the experimentally observed magnetic behavior. The model considers the hollow particles as constituted by small ordered clusters embedded in an antiferromagnetic environment (spins localized outside the clusters). In addition, the surface spins (in both inner and outer surfaces of theHNS) are affected by a local surface anisotropy. The strong effective magnetic anisotropy field of the clusters induces the bias observed when the system is cooled in the presence of a magnetic external field. This effect propagates through the exchange interaction into the entire particle.Fil: de Biasi, Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Lima, Enio Junior. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Vargas, Jose Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Zysler, Roberto Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Arbiol, Jordi. Universidad de Barcelona; EspañaFil: Ibarra, Alfonso. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; EspañaFil: Goya, Gerardo Fabian. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; EspañaFil: Ibarra, Ricardo M.. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; EspañaIOP Publishing2015-10-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/55302de Biasi, Emilio; Lima, Enio Junior; Vargas, Jose Marcelo; Zysler, Roberto Daniel; Arbiol, Jordi; et al.; Exchange bias in ferrite hollow nanoparticles originated by complex internal magnetic structure; IOP Publishing; Materials Research Express; 2; 10; 5-10-2015; 105001/1-105001/112053-1591CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.iopscience.iop.org/article/10.1088/2053-1591/2/10/105001/info:eu-repo/semantics/altIdentifier/doi/10.1088/2053-1591/2/10/105001info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:35:24Zoai:ri.conicet.gov.ar:11336/55302instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:35:24.767CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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