Reference : Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Electrical & electronics engineering
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/72701
Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3
English
Pekala, Marek [University of Warsaw > Department of Chemistry > > >]
Drozd, Vadym [Florida International University, Miami, USA > Centre for Study of Matter at Extreme Conditions > > >]
Fagnard, Jean-François [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques > >]
Vanderbemden, Philippe mailto [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques > >]
2010
Journal of Alloys & Compounds
Elsevier Science
507
350-355
Yes (verified by ORBi)
International
0925-8388
Lausanne
Switzerland
[en] magnetocaloric effect ; manganites ; nanocrystals
[en] Structure, magnetic and magnetocaloric properties of poly- and nanocrystalline La0.5Ca0.5MnO3 manganites prepared by the citrate sol–gel method are studied in a broad temperature range. The Arrott plots show that the phase transition is of the second order. The cooling efficiency of 93–97 J/kg is found for the poly- and nanocrystalline samples. The relatively weaker magnetocaloric effect in nanocrystalline La0.5Ca0.5MnO3 is spread over temperature range almost three times broader than for the polycrystalline one. Charge ordering effects decay in manganites with grain sizes below 150 nm.
Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Communauté française de Belgique - CfB ; Wallonie Bruxelles International - WBI
Researchers ; Professionals
http://hdl.handle.net/2268/72701
10.1016/j.jallcom.2010.07.165
© 2010 Elsevier B.V. All rights reserved

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