Effect of substitution of Fe for Mn on the structural, magnetic properties and magnetocaloric effect of LaNdSrCaMnO3.
In: Journal of Magnetism & Magnetic Materials, Jg. 378 (2015-03-15), S. 353-357
Online
academicJournal
Zugriff:
We have studied the structural, magnetic and magnetocaloric properties of La 0.6 Nd 0.1 Sr 0.15 Ca 0.15 Mn 1− x Fe x O 3 (LNSCMFe x ) perovskite samples. The samples were synthesized using the solid-state reaction at high temperature and were analyzed by XRD data based on the Rietveld refinement technique. LNSCMFe x samples crystallized in orthorhombic symmetry with Pnma space group. Besides, the curves of magnetization reveals that all samples exhibit a magnetic transition from the paramagnetic to ferromagnetic phase at the Curie temperature T C , which decreases from 327 K to 296 K with the increase of the Fe doping level from x =0 to x =0.1. The thermal evolution of magnetization in the ferromagnetic phase at low temperature varies as T 3/2 in accordance with Bloch's law. The magnitude of the isothermal magnetic entropy, (− Δ S M max ), at the FM Curie temperature increases from 3.79 J/kg K for x =0 composition to 5.8 J/kg K for x =0.1, under a magnetic field of 5 T. For an applied magnetic field of 5 T, the relative cooling power (RCP) values are found to vary between 173.66 and 231.76 J/kg. These results suggest that these materials could be used as an active magnetic refrigerant around room temperature. [ABSTRACT FROM AUTHOR]
Titel: |
Effect of substitution of Fe for Mn on the structural, magnetic properties and magnetocaloric effect of LaNdSrCaMnO3.
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Autor/in / Beteiligte Person: | Dhahri, Ja. ; Dhahri, A. ; Oummezzine, M. ; Hlil, E.K. |
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Zeitschrift: | Journal of Magnetism & Magnetic Materials, Jg. 378 (2015-03-15), S. 353-357 |
Veröffentlichung: | 2015 |
Medientyp: | academicJournal |
ISSN: | 0304-8853 (print) |
DOI: | 10.1016/j.jmmm.2014.10.163 |
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