Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order

On the nanoscale, CoO can have different polymorph crystal structures, zinc blende and wurtzite, apart from rock salt, which is the stable one in bulk. However, the magnetic structures of the zinc blende and wurtzite phases remain virtually unexplored. Here we discuss some of the main parameters con...

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Autores: Golosovsky, Igor V., Estrader, Marta, López-Ortega, Alberto, Roca, Alejandro G., López-Conesa, Lluís, Del Corro, Elena, Estradé, Sònia, Peiró, Francesca, Puente-Orench, Inés, Nogués, Josep
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/202681
Acesso em linha:http://hdl.handle.net/10261/202681
Access Level:acceso abierto
Palavra-chave:Synthesis of nanoparticles
Neutron diffraction
Incommensurate magnetic structure
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dc.title.none.fl_str_mv Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
title Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
spellingShingle Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
Golosovsky, Igor V.
Synthesis of nanoparticles
Neutron diffraction
Incommensurate magnetic structure
title_short Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
title_full Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
title_fullStr Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
title_full_unstemmed Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
title_sort Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic order
dc.creator.none.fl_str_mv Golosovsky, Igor V.
Estrader, Marta
López-Ortega, Alberto
Roca, Alejandro G.
López-Conesa, Lluís
Del Corro, Elena
Estradé, Sònia
Peiró, Francesca
Puente-Orench, Inés
Nogués, Josep
author Golosovsky, Igor V.
author_facet Golosovsky, Igor V.
Estrader, Marta
López-Ortega, Alberto
Roca, Alejandro G.
López-Conesa, Lluís
Del Corro, Elena
Estradé, Sònia
Peiró, Francesca
Puente-Orench, Inés
Nogués, Josep
author_role author
author2 Estrader, Marta
López-Ortega, Alberto
Roca, Alejandro G.
López-Conesa, Lluís
Del Corro, Elena
Estradé, Sònia
Peiró, Francesca
Puente-Orench, Inés
Nogués, Josep
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Generalitat de Catalunya
Agencia Estatal de Investigación (España)
Russian Foundation for Basic Research
Ministerio de Ciencia, Innovación y Universidades (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Synthesis of nanoparticles
Neutron diffraction
Incommensurate magnetic structure
topic Synthesis of nanoparticles
Neutron diffraction
Incommensurate magnetic structure
description On the nanoscale, CoO can have different polymorph crystal structures, zinc blende and wurtzite, apart from rock salt, which is the stable one in bulk. However, the magnetic structures of the zinc blende and wurtzite phases remain virtually unexplored. Here we discuss some of the main parameters controlling the growth of the CoO wurtzite and zinc blende polymorphs by thermal decomposition of cobalt (II) acetylacetonate. In addition, we present a detailed neutron diffraction study of oxygen deficient CoO (CoO0.70–0.75) nanoparticles with zinc blende (∼15 nm) and wurtzite (∼30 nm) crystal structures to unravel their magnetic order and its temperature evolution. The magnetic order of the zinc blende nanoparticles is antiferromagnetic and appears at the Néel temperature TN ∼ 203 K. It corresponds to the 3rd type of magnetic ordering in a face-centered cubic lattice with magnetic moments aligned along a cube edge. The magnetic structure in the wurtzite nanoparticles turned out to be rather complex with two perpendicular components. One component is incommensurate, of the longitudinal spin wave type, with the magnetic moments confined in the ab-plane. In the perpendicular direction, this magnetic order is uncorrelated, forming quasi-two-dimensional magnetic layers. The component of the magnetic moment, aligned along the hexagonal axis, is commensurate and corresponds to the antiferromagnetic order known as the 2nd type in a wurtzite structure. The Néel temperature of wurtzite phase is estimated to be ∼109 K. The temperature dependence of the magnetic reflections confirms the reduced dimensionality of the incommensurate magnetic order. Incommensurate magnetic structures in nanoparticles are an unusual phenomenon and in the case of wurtzite CoO it is probably caused by structural defects (e.g., vacancies, strains and stacking faults).
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/202681
url http://hdl.handle.net/10261/202681
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-79455-P
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
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instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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spelling Zinc blende and wurtzite CoO polymorph nanoparticles: rational synthesis and commensurate and incommensurate magnetic orderGolosovsky, Igor V.Estrader, MartaLópez-Ortega, AlbertoRoca, Alejandro G.López-Conesa, LluísDel Corro, ElenaEstradé, SòniaPeiró, FrancescaPuente-Orench, InésNogués, JosepSynthesis of nanoparticlesNeutron diffractionIncommensurate magnetic structureOn the nanoscale, CoO can have different polymorph crystal structures, zinc blende and wurtzite, apart from rock salt, which is the stable one in bulk. However, the magnetic structures of the zinc blende and wurtzite phases remain virtually unexplored. Here we discuss some of the main parameters controlling the growth of the CoO wurtzite and zinc blende polymorphs by thermal decomposition of cobalt (II) acetylacetonate. In addition, we present a detailed neutron diffraction study of oxygen deficient CoO (CoO0.70–0.75) nanoparticles with zinc blende (∼15 nm) and wurtzite (∼30 nm) crystal structures to unravel their magnetic order and its temperature evolution. The magnetic order of the zinc blende nanoparticles is antiferromagnetic and appears at the Néel temperature TN ∼ 203 K. It corresponds to the 3rd type of magnetic ordering in a face-centered cubic lattice with magnetic moments aligned along a cube edge. The magnetic structure in the wurtzite nanoparticles turned out to be rather complex with two perpendicular components. One component is incommensurate, of the longitudinal spin wave type, with the magnetic moments confined in the ab-plane. In the perpendicular direction, this magnetic order is uncorrelated, forming quasi-two-dimensional magnetic layers. The component of the magnetic moment, aligned along the hexagonal axis, is commensurate and corresponds to the antiferromagnetic order known as the 2nd type in a wurtzite structure. The Néel temperature of wurtzite phase is estimated to be ∼109 K. The temperature dependence of the magnetic reflections confirms the reduced dimensionality of the incommensurate magnetic order. Incommensurate magnetic structures in nanoparticles are an unusual phenomenon and in the case of wurtzite CoO it is probably caused by structural defects (e.g., vacancies, strains and stacking faults).This work was supported by the Russian grant RFBR 16-02-00058, the MAT2016-79455-P and MAT2015-68200-C2-2-P projects of the Spanish MINECO and by the 2017 SGR 292 and 2017 SGR 776 projects of the Generalitat de Catalunya. The ICN2 is supported by the Severo Ochoa Centres of Excellence programme funded by the Spanish Research Agency(AEI, grant no. SEV-2017-0706). ALO acknowledges the Juan de la Cierva Program (MINECO IJCI-2014-21530).Peer reviewedElsevierMinisterio de Economía y Competitividad (España)Generalitat de CatalunyaAgencia Estatal de Investigación (España)Russian Foundation for Basic ResearchMinisterio de Ciencia, Innovación y Universidades (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/202681reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2015-68200-C2-2-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-79455-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/SEV-2017-0706SEV-2017-0706/AEI/10.13039/501100011033info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/IJCI-2014-21530https://doi.org/10.1016/j.apmt.2019.06.005Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2026812026-05-22T06:33:51Z
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