Large magnetocaloric effect in Ti-modified La<subscript>0.70</subscript>Sr<subscript>0.30</subscript>MnO<subscript>3</subscript> perovskite
In: Materials Letters, Jg. 64 (2010-05-15), Heft 9, S. 1045-1048
Online
academicJournal
Zugriff:
Abstract: The effect of Ti substitution on the magnetocaloric effect of the La0.70Sr0.30MnO3 perovskite was investigated. The magnetic entropy change (−ΔS M ) was deduced by two methods: a Maxwell relation and the Landau theory. The magnetocaloric data displays a large value of the magnetic entropy change (−ΔS M ) near the Curie temperature (T C =210K), which increases when increasing the applied magnetic field. A good agreement is found between the experimental (−ΔS M ) and the one estimated by Landau theory. The relative cooling power values vary from 49 to 288Jkg−1 upon variation of the applied magnetic field at 1 and 5T. Under 5T, the relative cooling power value for La0.70Sr0.30Mn0.90Ti0.10O3 is about 70% of the conventional refrigerant Gd material. As a result, the herein reported compound can be considered as a promising material in magnetic refrigeration technology. [Copyright &y& Elsevier]
Titel: |
Large magnetocaloric effect in Ti-modified La<subscript>0.70</subscript>Sr<subscript>0.30</subscript>MnO<subscript>3</subscript> perovskite
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Autor/in / Beteiligte Person: | Kallel, Sami ; Kallel, Nabil ; Peña, Octavio ; Oumezzine, Mohamed |
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Zeitschrift: | Materials Letters, Jg. 64 (2010-05-15), Heft 9, S. 1045-1048 |
Veröffentlichung: | 2010 |
Medientyp: | academicJournal |
ISSN: | 0167-577X (print) |
DOI: | 10.1016/j.matlet.2010.02.005 |
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