Effect of trivalent rare earth doping on magnetic and magnetocaloric properties of Pr0.5(Ce,Eu,Y)0.1Sr0.4MnO3 manganites
| Autor: | A. Cheikhrouhou, N. Chniba-Boudjada, M. Ommezzine, Rafik M’nassri, A. Sakka |
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| Přispěvatelé: | Matériaux, Rayonnements, Structure (MRS), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de Physique des Matériaux.Sfax 3000, Tunisia., Université de Sfax - University of Sfax |
| Rok vydání: | 2016 |
| Předmět: |
[PHYS]Physics [physics]
010302 applied physics Materials science Doping Analytical chemistry Nanotechnology 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Paramagnetism Ferromagnetism 0103 physical sciences Magnetic refrigeration Curie General Materials Science Orthorhombic crystal system 0210 nano-technology ComputingMilieux_MISCELLANEOUS Powder diffraction |
| Zdroj: | Applied physics. A, Materials science & processing Applied physics. A, Materials science & processing, Springer Verlag, 2016, 122 (6), pp.603. ⟨10.1007/s00339-016-0125-5⟩ |
| ISSN: | 1432-0630 0947-8396 |
| DOI: | 10.1007/s00339-016-0125-5 |
| Popis: | Experimental studies of the structural, magnetic and magnetocaloric properties of the three compounds Pr0.5X0.1Sr0.4MnO3 (X = Ce, Eu and Y) are reported. Our samples were synthesized using the Pechini sol–gel method. X-ray powder diffraction at room temperature indicates that our materials crystallize in the orthorhombic structure with Pbnm space group. The compounds undergo a second-order magnetic transition from paramagnetic to ferromagnetic state around their own Curie temperatures T C ~ 310, 270 and 230 K for X = Ce, Eu and Y, respectively. A considerable magnetocaloric effect (MCE) is observed around room temperature. The maximum values of magnetic entropy change ∆S max are 3.54, 3.81 and 2.99 J/kgK for the samples with X = Ce, Eu and Y, respectively, when a magnetic field of 5 T was applied. The relative cooling power (RCP) values for the corresponding materials are 246.60, 261.66 and 298 J/kg. It is shown that for Pr0.5X0.1Sr0.4MnO3 the exponent n and the magnetic entropy change follow a master curve behavior. With the universal scaling curve, the experimental ∆S at several temperatures and fields can be extrapolated. |
| Databáze: | OpenAIRE |
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