Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys
Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1_xCu2 (R Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Riet...
| Autores: | , , , , , , , , , , |
|---|---|
| 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:10902/20566 |
| Acceso en línea: | http://hdl.handle.net/10902/20566 |
| Access Level: | acceso abierto |
| Palabra clave: | Magnetic nanoparticles Nanomagnetism Magnetic coupling Neutron diffraction Spin Glass |
| id |
ES_c4c4e8bfea6dca0f68d99217e167fffe |
|---|---|
| oai_identifier_str |
oai:repositorio.unican.es:10902/20566 |
| network_acronym_str |
ES |
| network_name_str |
España |
| spelling |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys Martín Jefremovas, Elizabeth|||0000-0001-8501-058X Fuente Rodríguez, María de la Alonso Masa, Javier|||0000-0003-0045-5390 Rodríguez Fernández, Jesús|||0000-0002-4046-2969 Espeso Martínez, José Ignacio|||0000-0002-4018-7186 Puente-Orench, Inés Rojas, Daniel P. Gracía-Prieto, Ana Fernández-Gubieda, María Luisa Rodríguez-Fernández, Lidia Fernández Barquín, Luis|||0000-0003-4722-3722 Magnetic nanoparticles Nanomagnetism Magnetic coupling Neutron diffraction Spin Glass Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1_xCu2 (R Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Rietveld refinements of the X-ray and Neutron diffraction patterns indicate that the crystalline structure in all alloys is consistent with TbCu2 orthorhombic Imma bulk crystalline structure. The analyses of the DC-magnetisation (MDC) and AC-susceptibility (cAC) show that three distinct degrees of disorder have been achieved by the combination of both the Tb3+replacement (dilution) and the nanoscaling. These disordered states are characterised by transitions which are evident to MDC, cAC and specific heat. There exists an evolution from the most ordered Superantiferromagnetic arrangement of the Tb0.5La0.5Cu2 NPs with Néel temperature, TN 27 K, and freezing temperature, Tf 7 K, to the less ordered weakly interacting Superparamagnetism of the Tb0.1Y0.9Cu2 nanoparticles (TN absent, and TB 3 K). The Super Spin Glass Tb0.5Gd0.5Cu2 nanoparticles (TN absent, and Tf 20 K) are considered an intermediate disposition in between those two extremes, according to their enhanced random-bond contribution to frustration. This work has been supported by the Spanish MAT2017-83631-C3-R grant. E.M.J.’s work was supported by “Beca de Colaboración”, BDNS: 311327 granted by Ministerio de Educación, Cultura y Deporte and “Beca Concepción Arenal” BDNS: 406333 granted by the Gobierno de Cantabria and the Universidad de Cantabria. MRF work was supported by FPI (BES-2012-058722). MDPI http://hdl.handle.net/10902/20566 |
| title |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| spellingShingle |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys Martín Jefremovas, Elizabeth|||0000-0001-8501-058X Magnetic nanoparticles Nanomagnetism Magnetic coupling Neutron diffraction Spin Glass |
| title_short |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| title_full |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| title_fullStr |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| title_full_unstemmed |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| title_sort |
Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys |
| author |
Martín Jefremovas, Elizabeth|||0000-0001-8501-058X |
| author_facet |
Martín Jefremovas, Elizabeth|||0000-0001-8501-058X Fuente Rodríguez, María de la Alonso Masa, Javier|||0000-0003-0045-5390 Rodríguez Fernández, Jesús|||0000-0002-4046-2969 Espeso Martínez, José Ignacio|||0000-0002-4018-7186 Puente-Orench, Inés Rojas, Daniel P. Gracía-Prieto, Ana Fernández-Gubieda, María Luisa Rodríguez-Fernández, Lidia Fernández Barquín, Luis|||0000-0003-4722-3722 |
| author_role |
author |
| author2 |
Fuente Rodríguez, María de la Alonso Masa, Javier|||0000-0003-0045-5390 Rodríguez Fernández, Jesús|||0000-0002-4046-2969 Espeso Martínez, José Ignacio|||0000-0002-4018-7186 Puente-Orench, Inés Rojas, Daniel P. Gracía-Prieto, Ana Fernández-Gubieda, María Luisa Rodríguez-Fernández, Lidia Fernández Barquín, Luis|||0000-0003-4722-3722 |
| author2_role |
author author author author author author author author author author |
| topic |
Magnetic nanoparticles Nanomagnetism Magnetic coupling Neutron diffraction Spin Glass |
| topic_facet |
Magnetic nanoparticles Nanomagnetism Magnetic coupling Neutron diffraction Spin Glass |
| description |
Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1_xCu2 (R Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Rietveld refinements of the X-ray and Neutron diffraction patterns indicate that the crystalline structure in all alloys is consistent with TbCu2 orthorhombic Imma bulk crystalline structure. The analyses of the DC-magnetisation (MDC) and AC-susceptibility (cAC) show that three distinct degrees of disorder have been achieved by the combination of both the Tb3+replacement (dilution) and the nanoscaling. These disordered states are characterised by transitions which are evident to MDC, cAC and specific heat. There exists an evolution from the most ordered Superantiferromagnetic arrangement of the Tb0.5La0.5Cu2 NPs with Néel temperature, TN 27 K, and freezing temperature, Tf 7 K, to the less ordered weakly interacting Superparamagnetism of the Tb0.1Y0.9Cu2 nanoparticles (TN absent, and TB 3 K). The Super Spin Glass Tb0.5Gd0.5Cu2 nanoparticles (TN absent, and Tf 20 K) are considered an intermediate disposition in between those two extremes, according to their enhanced random-bond contribution to frustration. |
| publishDate |
2020 |
| format |
article |
| url |
http://hdl.handle.net/10902/20566 |
| language |
eng |
| eu_rights_str_mv |
openAccess |
| publisher |
MDPI |
| institution |
Universidad de Cantabria (UC) |
| collection |
UCrea Repositorio Abierto de la Universidad de Cantabria |
| reponame_str |
UCrea Repositorio Abierto de la Universidad de Cantabria |
| instname_str |
Universidad de Cantabria (UC) |
| _version_ |
1878440456230010880 |
| publishDateSort |
2020 |
| author_browse |
Alonso Masa, Javier|||0000-0003-0045-5390 Espeso Martínez, José Ignacio|||0000-0002-4018-7186 Fernández Barquín, Luis|||0000-0003-4722-3722 Fernández-Gubieda, María Luisa Fuente Rodríguez, María de la Gracía-Prieto, Ana Martín Jefremovas, Elizabeth|||0000-0001-8501-058X Puente-Orench, Inés Rodríguez Fernández, Jesús|||0000-0002-4046-2969 Rodríguez-Fernández, Lidia Rojas, Daniel P. |
| publisherStr |
MDPI |
| score |
6,924472 |