Magnetic and magnetocaloric properties of Pr0.8Bi0.2FexMn1-xO3 compounds with 0 ≤ x ≤ 0.3
| Autor: | Kh. Sbissi, M. Ellouze, F. Elhalouani, M. L. Kahn |
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| Přispěvatelé: | École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax (ENIS), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Faculté des Sciences de Sfax, Université de Sfax - University of Sfax |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Phase transition
Magnetic measurements Materials science Condensed matter physics Doping Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Magnetization Magnetic refrigeration Curie temperature [CHIM.COOR]Chemical Sciences/Coordination chemistry Sol-gel |
| Zdroj: | Journal of Superconductivity and Novel Magnetism Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2015, 28 (10), pp.2899-2906. ⟨10.1007/s10948-015-3181-8⟩ |
| ISSN: | 1557-1939 1557-1947 |
| DOI: | 10.1007/s10948-015-3181-8⟩ |
| Popis: | This paper studies the effects of the Mn site substitution by Fe on the magnetic properties and the magnetocaloric properties of Pr0.8Bi0.2Fe x Mn1−x O3 elaborated by a sol–gel method. The variation of the magnetization as a function of temperature and applied magnetic field was carried out. Magnetic measurements show that all the materials exhibit a paramagnetic–ferromagnetic transition when the temperature decreases. The dependence of the Curie temperature (T C) and the magnetic entropy change (ΔS M) when varying the Fe doping content was investigated. The measured value of TC was 114, 97, 94, and 77 K for x = 0, 0.1, 0.2, and 0.3, respectively. The samples with x = 0 and x = 0.1 present a second-order phase transition, while the samples with x = 0.2 and x = 0.3 exhibit a first-order phase transition. As the concentration of Fe increases, the maximum entropy change, ${\Delta } S_{\mathrm {M}}^{\max }$ , decreases gradually, from 2.77 J kg−1 K−1 (x = 0) to 1.05 J kg−1 K−1 (x = 0.3), when the magnetic field changes from 0 to 5 T. |
| Databáze: | OpenAIRE |
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