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Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects
Bulk nanocrystalline samples of La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) (0 ≤ x ≤ 0.15) manganites are prepared by the sol–gel based Pechini method. The effect of the substitution for Mn with Cu upon the structural and magnetic properties has been investigated by means of X-ray diffraction (XRD), Ram...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9078421/ https://www.ncbi.nlm.nih.gov/pubmed/35540360 http://dx.doi.org/10.1039/c7ra13244a |
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author | Chebaane, M. Bellouz, R. Oumezzine, Ma. Hlil, E. K. Fouzri, A. |
author_facet | Chebaane, M. Bellouz, R. Oumezzine, Ma. Hlil, E. K. Fouzri, A. |
author_sort | Chebaane, M. |
collection | PubMed |
description | Bulk nanocrystalline samples of La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) (0 ≤ x ≤ 0.15) manganites are prepared by the sol–gel based Pechini method. The effect of the substitution for Mn with Cu upon the structural and magnetic properties has been investigated by means of X-ray diffraction (XRD), Raman spectroscopy and dc magnetization measurements. The structural parameters obtained using Rietveld refinement of XRD data showed perovskite structures with rhombohedral (R3̄c) symmetry without any detectable impurity phase. Raman spectra at room temperature reveal a gradual change in phonon modes with increasing copper concentration. The analysis of the crystallographic data suggested a strong correlation between structure and magnetism, for instance a relationship between a distortion of the MnO(6) octahedron and the reduction in the Curie temperature, T(c). A paramagnetic to ferromagnetic phase transition at T(C) is observed. The experimental results confirm that Mn-site substitution with Cu destroys the Mn(3+)–O(2−)–Mn(4+) bridges and weakens the double exchange (DE) interaction between Mn(3+) and Mn(4+) ions, which shows an obvious suppression of the FM interaction in the La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) matrix. The maximum magnetic entropy change −ΔS(max)(M) is found to decrease with increasing Cu content from 4.43 J kg(−1) K(−1) for x = 0 to 3.03 J kg(−1) K(−1) for x = 0.15 upon a 5 T applied field change. |
format | Online Article Text |
id | pubmed-9078421 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90784212022-05-09 Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects Chebaane, M. Bellouz, R. Oumezzine, Ma. Hlil, E. K. Fouzri, A. RSC Adv Chemistry Bulk nanocrystalline samples of La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) (0 ≤ x ≤ 0.15) manganites are prepared by the sol–gel based Pechini method. The effect of the substitution for Mn with Cu upon the structural and magnetic properties has been investigated by means of X-ray diffraction (XRD), Raman spectroscopy and dc magnetization measurements. The structural parameters obtained using Rietveld refinement of XRD data showed perovskite structures with rhombohedral (R3̄c) symmetry without any detectable impurity phase. Raman spectra at room temperature reveal a gradual change in phonon modes with increasing copper concentration. The analysis of the crystallographic data suggested a strong correlation between structure and magnetism, for instance a relationship between a distortion of the MnO(6) octahedron and the reduction in the Curie temperature, T(c). A paramagnetic to ferromagnetic phase transition at T(C) is observed. The experimental results confirm that Mn-site substitution with Cu destroys the Mn(3+)–O(2−)–Mn(4+) bridges and weakens the double exchange (DE) interaction between Mn(3+) and Mn(4+) ions, which shows an obvious suppression of the FM interaction in the La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) matrix. The maximum magnetic entropy change −ΔS(max)(M) is found to decrease with increasing Cu content from 4.43 J kg(−1) K(−1) for x = 0 to 3.03 J kg(−1) K(−1) for x = 0.15 upon a 5 T applied field change. The Royal Society of Chemistry 2018-02-13 /pmc/articles/PMC9078421/ /pubmed/35540360 http://dx.doi.org/10.1039/c7ra13244a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Chebaane, M. Bellouz, R. Oumezzine, Ma. Hlil, E. K. Fouzri, A. Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title | Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title_full | Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title_fullStr | Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title_full_unstemmed | Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title_short | Copper-doped lanthanum manganite La(0.65)Ce(0.05)Sr(0.3)Mn(1−x)Cu(x)O(3) influence on structural, magnetic and magnetocaloric effects |
title_sort | copper-doped lanthanum manganite la(0.65)ce(0.05)sr(0.3)mn(1−x)cu(x)o(3) influence on structural, magnetic and magnetocaloric effects |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9078421/ https://www.ncbi.nlm.nih.gov/pubmed/35540360 http://dx.doi.org/10.1039/c7ra13244a |
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