Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite
In: ISSN: 0304-8853 ; Journal of Magnetism and Magnetic Materials ; https://hal.archives-ouvertes.fr/hal-00821908 ; Journal of Magnetism and Magnetic Materials, Elsevier, 2012, 324 (22), pp.3615-3619. ⟨10.1016/j.jmmm.2012.06.024⟩, 2012
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Zugriff:
International audience ; Critical behavior in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 ceramics was studied using magnetization methods. Results show that the paramagnetic-ferromagnetic transition is of second order. Based on the critical behavior analysis using the Banerjee criterion and the Kouvel-Fisher method, we find the critical exponents: β=0.395±0.010, γ=1.402±0.010, and δ=5.208±0.007, for which the magnetic interaction is satisfied within the three-dimensional Heisenberg model. Results indicate the presence of short-range interactions. The magnetic entropy change (−ΔSM) reached maximum values of 1.75, 1.45, 1.15, 0.8 and 0.43 J Kg−1 K−1 under a magnetic field variation of 5, 4, 3, 2 and 1 T, respectively. Nevertheless, these (−ΔSM) values are much low for any potential application at this moment. The nature of this phenomenon is discussed in relation to the characteristics of the magnetic phase transition and critical exponents.
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Critical behavior and magnetic entropy change in the La0.6Sr0.4Mn0.8Fe0.1Cr0.1O3 perovskite
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| Autor/in / Beteiligte Person: | Ben Abdelkhalek, Sonia ; Kallel, Nabil ; Kallel, Sami ; Peña, Octavio ; Oumezzine, Mohamed ; Institut des Sciences Chimiques de Rennes (ISCR) ; Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1) ; Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes) ; Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA) ; The Tunisia-France Exchange Program DGRS-CNRS Project no. 09//R 11-52. |
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| Zeitschrift: | ISSN: 0304-8853 ; Journal of Magnetism and Magnetic Materials ; https://hal.archives-ouvertes.fr/hal-00821908 ; Journal of Magnetism and Magnetic Materials, Elsevier, 2012, 324 (22), pp.3615-3619. ⟨10.1016/j.jmmm.2012.06.024⟩, 2012 |
| Veröffentlichung: | HAL CCSD ; Elsevier, 2012 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.jmmm.2012.06.024 |
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