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Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material
Structural, magnetic, magnetocaloric, electrical and magnetoresistance properties of an LaNaMnMoO(6) powder sample have been investigated by X-ray diffraction (XRD), magnetic and electrical measurements. Our sample has been synthesized using the ceramic method. Rietveld refinements of the XRD patter...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5717661/ https://www.ncbi.nlm.nih.gov/pubmed/29291087 http://dx.doi.org/10.1098/rsos.170920 |
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author | Borchani, Sameh Megdiche Koubaa, Wissem Cheikh-Rouhou Megdiche, Makrem |
author_facet | Borchani, Sameh Megdiche Koubaa, Wissem Cheikh-Rouhou Megdiche, Makrem |
author_sort | Borchani, Sameh Megdiche |
collection | PubMed |
description | Structural, magnetic, magnetocaloric, electrical and magnetoresistance properties of an LaNaMnMoO(6) powder sample have been investigated by X-ray diffraction (XRD), magnetic and electrical measurements. Our sample has been synthesized using the ceramic method. Rietveld refinements of the XRD patterns show that our sample is single phase and it crystallizes in the orthorhombic structure with Pnma space group. Magnetization versus temperature in a magnetic applied field of 0.05 T shows that our sample exhibits a paramagnetic–ferromagnetic transition with decreasing temperature. The Curie temperature T(C) is found to be 320 K. Arrott plots show that all our double-perovskite oxides exhibit a second-order magnetic phase transition. From the measured magnetization data of an LaNaMnMoO(6) sample as a function of the magnetic applied field, the associated magnetic entropy change |−ΔSM| and the relative cooling power (RCP) have been determined. In the vicinity of T(C), |−ΔSM| reached, in a magnetic applied field of 8 T, a maximum value of ∼4 J kg(−1) K(−1). Our sample undergoes a large magnetocaloric effect at near-room temperature. Resistivity measurements reveal the presence of an insulating-metal transition at Tρ = 180 K. A magnetoresistance of 30% has been observed at room temperature for 6 T, significantly larger than that reported for the A(2)FeMoO(6) (A = Sr, Ba) double-perovskite system. |
format | Online Article Text |
id | pubmed-5717661 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-57176612017-12-29 Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material Borchani, Sameh Megdiche Koubaa, Wissem Cheikh-Rouhou Megdiche, Makrem R Soc Open Sci Chemistry Structural, magnetic, magnetocaloric, electrical and magnetoresistance properties of an LaNaMnMoO(6) powder sample have been investigated by X-ray diffraction (XRD), magnetic and electrical measurements. Our sample has been synthesized using the ceramic method. Rietveld refinements of the XRD patterns show that our sample is single phase and it crystallizes in the orthorhombic structure with Pnma space group. Magnetization versus temperature in a magnetic applied field of 0.05 T shows that our sample exhibits a paramagnetic–ferromagnetic transition with decreasing temperature. The Curie temperature T(C) is found to be 320 K. Arrott plots show that all our double-perovskite oxides exhibit a second-order magnetic phase transition. From the measured magnetization data of an LaNaMnMoO(6) sample as a function of the magnetic applied field, the associated magnetic entropy change |−ΔSM| and the relative cooling power (RCP) have been determined. In the vicinity of T(C), |−ΔSM| reached, in a magnetic applied field of 8 T, a maximum value of ∼4 J kg(−1) K(−1). Our sample undergoes a large magnetocaloric effect at near-room temperature. Resistivity measurements reveal the presence of an insulating-metal transition at Tρ = 180 K. A magnetoresistance of 30% has been observed at room temperature for 6 T, significantly larger than that reported for the A(2)FeMoO(6) (A = Sr, Ba) double-perovskite system. The Royal Society Publishing 2017-11-08 /pmc/articles/PMC5717661/ /pubmed/29291087 http://dx.doi.org/10.1098/rsos.170920 Text en © 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Chemistry Borchani, Sameh Megdiche Koubaa, Wissem Cheikh-Rouhou Megdiche, Makrem Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title | Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title_full | Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title_fullStr | Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title_full_unstemmed | Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title_short | Structural, magnetic and electrical properties of a new double-perovskite LaNaMnMoO(6) material |
title_sort | structural, magnetic and electrical properties of a new double-perovskite lanamnmoo(6) material |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5717661/ https://www.ncbi.nlm.nih.gov/pubmed/29291087 http://dx.doi.org/10.1098/rsos.170920 |
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