Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles

Martín Jefremovas, Elizabeth|||0000-0001-8501-058X; Alonso Masa, Javier|||0000-0003-0045-5390; Fuente Rodríguez, María de la; Rodríguez Fernández, Jesús|||0000-0002-4046-2969; Espeso Martínez, José Ignacio|||0000-0002-4018-7186; Rojas Pupo, Daniel|||0000-0002-5620-8586; García Prieto, Ana; Fernández-Gubieda Ruiz, María Luisa; Fernández Barquín, Luis|||0000-0003-4722-3722

Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles

A series of GdCu 22 nanoparticles with controlled sizes ranging from 7 nm to 40 nm has been produced via high-energy inert-gas ball milling. Rietveld refinements on the X-ray diffraction measurements ensure that the bulk crystalline ImmaImma structure is retained within the nanoparticles, thanks to...

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Autores:	Martín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X, Alonso Masa, Javier\|\|\|0000-0003-0045-5390, Fuente Rodríguez, María de la, Rodríguez Fernández, Jesús\|\|\|0000-0002-4046-2969, Espeso Martínez, José Ignacio\|\|\|0000-0002-4018-7186, Rojas Pupo, Daniel\|\|\|0000-0002-5620-8586, García Prieto, Ana, Fernández-Gubieda Ruiz, María Luisa, Fernández Barquín, Luis\|\|\|0000-0003-4722-3722
Tipo de recurso:	artículo
Fecha de publicación:	2020
País:	España
Institución:	Universidad de Cantabria (UC)
Repositorio:	UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:	inglés
OAI Identifier:	oai:repositorio.unican.es:10902/20562
Acceso en línea:	http://hdl.handle.net/10902/20562
Access Level:	acceso abierto
Palabra clave:	Magnetic nanoparticles Rare earth intermetallics Magnetic coupling X-ray diffraction Spin Glass

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spelling	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 NanoparticlesMartín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X Alonso Masa, Javier\|\|\|0000-0003-0045-5390Fuente Rodríguez, María de laRodríguez Fernández, Jesús\|\|\|0000-0002-4046-2969Espeso Martínez, José Ignacio\|\|\|0000-0002-4018-7186Rojas Pupo, Daniel\|\|\|0000-0002-5620-8586García Prieto, AnaFernández-Gubieda Ruiz, María LuisaFernández Barquín, Luis\|\|\|0000-0003-4722-3722Magnetic nanoparticlesRare earth intermetallicsMagnetic couplingX-ray diffractionSpin GlassA series of GdCu 22 nanoparticles with controlled sizes ranging from 7 nm to 40 nm has been produced via high-energy inert-gas ball milling. Rietveld refinements on the X-ray diffraction measurements ensure that the bulk crystalline ImmaImma structure is retained within the nanoparticles, thanks to the employed low milling times ranging from t = 0.5 to t = 5 h. The analysis of the magnetic measurements shows a crossover from Superantiferromagnetism (SAF) to a Super Spin Glass state as the size decreases at NP size of ?D???D?? 18 nm. The microstrain contribution, which is always kept below 1%, together with the increasing surface-to-core ratio of the magnetic moments, trigger the magnetic disorder. Additionally, an extra contribution to the magnetic disorder is revealed within the SAF state, as the oscillating RKKY indirect exchange achieves to couple with the aforementioned contribution that emerges from the size reduction. The combination of both sources of disorder leads to a maximised frustration for ?D???D?? 25 nm sized NPs.This work has been supported by MAT2017-83631-C3-R. EMJ thanks the “Beca Concepción Arenal” BDNS: 406333 granted by the Gobierno de Cantabria and the Universidad de CantabriaMDPIUniversidad de Cantabria20202020-06-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/20562Nanomaterials 2020, 10(6), 1117reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/205622026-06-02T12:39:31Z
dc.title.none.fl_str_mv	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
title	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
spellingShingle	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles Martín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X Magnetic nanoparticles Rare earth intermetallics Magnetic coupling X-ray diffraction Spin Glass
title_short	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
title_full	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
title_fullStr	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
title_full_unstemmed	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
title_sort	Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles
dc.creator.none.fl_str_mv	Martín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X Alonso Masa, Javier\|\|\|0000-0003-0045-5390 Fuente Rodríguez, María de la Rodríguez Fernández, Jesús\|\|\|0000-0002-4046-2969 Espeso Martínez, José Ignacio\|\|\|0000-0002-4018-7186 Rojas Pupo, Daniel\|\|\|0000-0002-5620-8586 García Prieto, Ana Fernández-Gubieda Ruiz, María Luisa Fernández Barquín, Luis\|\|\|0000-0003-4722-3722
author	Martín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X
author_facet	Martín Jefremovas, Elizabeth\|\|\|0000-0001-8501-058X Alonso Masa, Javier\|\|\|0000-0003-0045-5390 Fuente Rodríguez, María de la Rodríguez Fernández, Jesús\|\|\|0000-0002-4046-2969 Espeso Martínez, José Ignacio\|\|\|0000-0002-4018-7186 Rojas Pupo, Daniel\|\|\|0000-0002-5620-8586 García Prieto, Ana Fernández-Gubieda Ruiz, María Luisa Fernández Barquín, Luis\|\|\|0000-0003-4722-3722
author_role	author
author2	Alonso Masa, Javier\|\|\|0000-0003-0045-5390 Fuente Rodríguez, María de la Rodríguez Fernández, Jesús\|\|\|0000-0002-4046-2969 Espeso Martínez, José Ignacio\|\|\|0000-0002-4018-7186 Rojas Pupo, Daniel\|\|\|0000-0002-5620-8586 García Prieto, Ana Fernández-Gubieda Ruiz, María Luisa Fernández Barquín, Luis\|\|\|0000-0003-4722-3722
author2_role	author author author author author author author author
dc.contributor.none.fl_str_mv	Universidad de Cantabria
dc.subject.none.fl_str_mv	Magnetic nanoparticles Rare earth intermetallics Magnetic coupling X-ray diffraction Spin Glass
topic	Magnetic nanoparticles Rare earth intermetallics Magnetic coupling X-ray diffraction Spin Glass
description	A series of GdCu 22 nanoparticles with controlled sizes ranging from 7 nm to 40 nm has been produced via high-energy inert-gas ball milling. Rietveld refinements on the X-ray diffraction measurements ensure that the bulk crystalline ImmaImma structure is retained within the nanoparticles, thanks to the employed low milling times ranging from t = 0.5 to t = 5 h. The analysis of the magnetic measurements shows a crossover from Superantiferromagnetism (SAF) to a Super Spin Glass state as the size decreases at NP size of ?D???D?? 18 nm. The microstrain contribution, which is always kept below 1%, together with the increasing surface-to-core ratio of the magnetic moments, trigger the magnetic disorder. Additionally, an extra contribution to the magnetic disorder is revealed within the SAF state, as the oscillating RKKY indirect exchange achieves to couple with the aforementioned contribution that emerges from the size reduction. The combination of both sources of disorder leads to a maximised frustration for ?D???D?? 25 nm sized NPs.
publishDate	2020
dc.date.none.fl_str_mv	2020 2020-06-01
dc.type.none.fl_str_mv	journal article http://purl.org/coar/resource_type/c_6501 NA http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10902/20562
url	http://hdl.handle.net/10902/20562
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.rights.none.fl_str_mv	open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv	info:eu-repo/semantics/openAccess
rights_invalid_str_mv	open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv	openAccess
dc.publisher.none.fl_str_mv	MDPI
publisher.none.fl_str_mv	MDPI
dc.source.none.fl_str_mv	Nanomaterials 2020, 10(6), 1117 reponame:UCrea Repositorio Abierto de la Universidad de Cantabria instname:Universidad de Cantabria (UC)
instname_str	Universidad de Cantabria (UC)
reponame_str	UCrea Repositorio Abierto de la Universidad de Cantabria
collection	UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score	15.300719

Investigating the Size and Microstrain Influence in the Magnetic Order/Disorder State of GdCu2 Nanoparticles

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