ORBi: Pekala Marek - Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3

Reference : Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry Engineering, computing & technology : Electrical & electronics engineering Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/72701

Title :	Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3
Language :	English
Author, co-author :	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 [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques > >]
Publication date :	2010
Journal title :	Journal of Alloys & Compounds
Publisher :	Elsevier Science
Volume :	507
Pages :	350-355
Audience :	International
ISSN :	0925-8388
City :	Lausanne
Country :	Switzerland
Keywords :	[en] magnetocaloric effect ; manganites ; nanocrystals
Abstract :	[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.
Research units :	Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Funders :	Communauté française de Belgique - CfB ; Wallonie Bruxelles International - WBI
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/72701
DOI :	10.1016/j.jallcom.2010.07.165
Mentions required by the publisher for OA :	© 2010 Elsevier B.V. All rights reserved

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