Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)

The aim of the present work is to study the influence of a partial substitution of Mn by Zr in MnCoGe alloys. The X-ray diffraction (XRD) studies revealed a coexistence of the orthorhombic TiNiSi-type and hexagonal Ni(2)In- type phases. The Rietveld analysis showed that the changes in lattice consta...

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Autores principales: Kutynia, Karolina, Gębara, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8201026/
https://www.ncbi.nlm.nih.gov/pubmed/34200381
http://dx.doi.org/10.3390/ma14113129
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author Kutynia, Karolina
Gębara, Piotr
author_facet Kutynia, Karolina
Gębara, Piotr
author_sort Kutynia, Karolina
collection PubMed
description The aim of the present work is to study the influence of a partial substitution of Mn by Zr in MnCoGe alloys. The X-ray diffraction (XRD) studies revealed a coexistence of the orthorhombic TiNiSi-type and hexagonal Ni(2)In- type phases. The Rietveld analysis showed that the changes in lattice constants and content of recognized phases depended on the Zr addition. The occurrence of structural transformation was detected. This transformation was confirmed by analysis of the temperature dependence of exponent n given in the relation ΔS(M) = C·(B(MAX))(n). A decrease of the Curie temperature with an increase of the Zr content in the alloy composition was detected. The magnetic entropy changes were 6.93, 13.42, 3.96, and 2.94 J/(kg K) for Mn(0.97)Zr(0.03)CoGe, Mn(0.95)Zr(0.05)CoGe, Mn(0.93)Zr(0.07)CoGe, and Mn(0.9)Zr(0.1)CoGe, respectively. A significant rise in the magnetic entropy change for samples doped by Zr (x = 0.05) was caused by structural transformation.
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spelling pubmed-82010262021-06-15 Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1) Kutynia, Karolina Gębara, Piotr Materials (Basel) Article The aim of the present work is to study the influence of a partial substitution of Mn by Zr in MnCoGe alloys. The X-ray diffraction (XRD) studies revealed a coexistence of the orthorhombic TiNiSi-type and hexagonal Ni(2)In- type phases. The Rietveld analysis showed that the changes in lattice constants and content of recognized phases depended on the Zr addition. The occurrence of structural transformation was detected. This transformation was confirmed by analysis of the temperature dependence of exponent n given in the relation ΔS(M) = C·(B(MAX))(n). A decrease of the Curie temperature with an increase of the Zr content in the alloy composition was detected. The magnetic entropy changes were 6.93, 13.42, 3.96, and 2.94 J/(kg K) for Mn(0.97)Zr(0.03)CoGe, Mn(0.95)Zr(0.05)CoGe, Mn(0.93)Zr(0.07)CoGe, and Mn(0.9)Zr(0.1)CoGe, respectively. A significant rise in the magnetic entropy change for samples doped by Zr (x = 0.05) was caused by structural transformation. MDPI 2021-06-07 /pmc/articles/PMC8201026/ /pubmed/34200381 http://dx.doi.org/10.3390/ma14113129 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kutynia, Karolina
Gębara, Piotr
Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title_full Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title_fullStr Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title_full_unstemmed Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title_short Tuning of the Structure and Magnetocaloric Effect of Mn(1−x)Zr(x)CoGe Alloys (Where x = 0.03, 0.05, 0.07, and 0.1)
title_sort tuning of the structure and magnetocaloric effect of mn(1−x)zr(x)coge alloys (where x = 0.03, 0.05, 0.07, and 0.1)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8201026/
https://www.ncbi.nlm.nih.gov/pubmed/34200381
http://dx.doi.org/10.3390/ma14113129
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