Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power

Manganites of the family La0.7Ca0.3−xSrxMnO3 were fabricated by four preparation methods: (a) the microwave-assisted sol-gel Pechini method; (b) sol-gel Pechini chemical synthesis; (c) solid-state reaction with a planetary mill; and (d) solid-state reaction with an attritor mill, in order...

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Main Authors: María E. Botello-Zubiate, María C. Grijalva-Castillo, Daniel Soto-Parra, Renee J. Sáenz-Hernández, Carlos R. Santillán-Rodríguez, José A. Matutes-Aquino
Format: Article
Language:English
Published: MDPI AG 2019-01-01
Series:Materials
Subjects:
Online Access:http://www.mdpi.com/1996-1944/12/2/309
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spelling doaj-62bf47917f034ac8bb03509e108d9c9e2020-11-25T00:42:01ZengMDPI AGMaterials1996-19442019-01-0112230910.3390/ma12020309ma12020309Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling PowerMaría E. Botello-Zubiate0María C. Grijalva-Castillo1Daniel Soto-Parra2Renee J. Sáenz-Hernández3Carlos R. Santillán-Rodríguez4José A. Matutes-Aquino5Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, MexicoCONACYT-Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, MexicoTecnológico Nacional de México/Instituto Tecnológico de Delicias, Paseo Tecnológico km. 3.5, Cd. Delicias, Chihuahua 33000, MexicoCentro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, MexicoCentro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, MexicoCentro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, MexicoManganites of the family La0.7Ca0.3−xSrxMnO3 were fabricated by four preparation methods: (a) the microwave-assisted sol-gel Pechini method; (b) sol-gel Pechini chemical synthesis; (c) solid-state reaction with a planetary mill; and (d) solid-state reaction with an attritor mill, in order to study the effect of the preparation route used on its magnetocaloric and magnetic properties. In addition, the manganites manufactured by the Pechini sol-gel method were compacted using Spark Plasma Sintering (SPS) to determine how the consolidation process influences its magnetocaloric properties. The Curie temperatures of manganites prepared by the different methods were determined in ~295 K, with the exception of those prepared by a solid-state reaction with an attritor mill which was 301 K, so there is no correlation between the particle size and the Curie temperature. All samples gave a positive slope in the Arrot plots, which implies that the samples underwent a second order Ferromagnetic (FM)–Paramagnetic (PM) phase transition. Pechini sol-gel manganite presents higher values of Relative Cooling Power (RCP) than the solid-state reaction manganite, because its entropy change curves are smaller, but wider, associated to the particle size obtained by the preparation method. The SPS technique proved to be easier and faster in producing consolidated solids for applications in active magnetic regenerative refrigeration compared with other compaction methods.http://www.mdpi.com/1996-1944/12/2/309magnetic refrigerationrelative cooling powerspark plasma sintering
collection DOAJ
language English
format Article
sources DOAJ
author María E. Botello-Zubiate
María C. Grijalva-Castillo
Daniel Soto-Parra
Renee J. Sáenz-Hernández
Carlos R. Santillán-Rodríguez
José A. Matutes-Aquino
spellingShingle María E. Botello-Zubiate
María C. Grijalva-Castillo
Daniel Soto-Parra
Renee J. Sáenz-Hernández
Carlos R. Santillán-Rodríguez
José A. Matutes-Aquino
Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
Materials
magnetic refrigeration
relative cooling power
spark plasma sintering
author_facet María E. Botello-Zubiate
María C. Grijalva-Castillo
Daniel Soto-Parra
Renee J. Sáenz-Hernández
Carlos R. Santillán-Rodríguez
José A. Matutes-Aquino
author_sort María E. Botello-Zubiate
title Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
title_short Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
title_full Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
title_fullStr Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
title_full_unstemmed Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power
title_sort preparation of la0.7ca0.3−xsrxmno3 manganites by four synthesis methods and their influence on the magnetic properties and relative cooling power
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2019-01-01
description Manganites of the family La0.7Ca0.3−xSrxMnO3 were fabricated by four preparation methods: (a) the microwave-assisted sol-gel Pechini method; (b) sol-gel Pechini chemical synthesis; (c) solid-state reaction with a planetary mill; and (d) solid-state reaction with an attritor mill, in order to study the effect of the preparation route used on its magnetocaloric and magnetic properties. In addition, the manganites manufactured by the Pechini sol-gel method were compacted using Spark Plasma Sintering (SPS) to determine how the consolidation process influences its magnetocaloric properties. The Curie temperatures of manganites prepared by the different methods were determined in ~295 K, with the exception of those prepared by a solid-state reaction with an attritor mill which was 301 K, so there is no correlation between the particle size and the Curie temperature. All samples gave a positive slope in the Arrot plots, which implies that the samples underwent a second order Ferromagnetic (FM)–Paramagnetic (PM) phase transition. Pechini sol-gel manganite presents higher values of Relative Cooling Power (RCP) than the solid-state reaction manganite, because its entropy change curves are smaller, but wider, associated to the particle size obtained by the preparation method. The SPS technique proved to be easier and faster in producing consolidated solids for applications in active magnetic regenerative refrigeration compared with other compaction methods.
topic magnetic refrigeration
relative cooling power
spark plasma sintering
url http://www.mdpi.com/1996-1944/12/2/309
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