ORBi: Fabris Frederik Wolff - Magnetocaloric effect and magnetic properties of Tb0.9Sn0.1MnO3

Reference : Magnetocaloric effect and magnetic properties of Tb0.9Sn0.1MnO3


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/1744

Title :	Magnetocaloric effect and magnetic properties of Tb0.9Sn0.1MnO3
Language :	English
Author, co-author :	Fabris, Frederik Wolff [Université de Liège - ULg > SUPRATECS > > >]
	Pekala, Marek [University of Warsaw > > > > > >]
	Drozd, V. [National Taiwan University > > > > > >]
	Fagnard, Jean-François [Université de Liège - ULg > Dép. d'électric.]
	Vanderbemden, Philippe [Université de Liège - ULg > > Capteurs et systèmes de mesures électriques >]
	Liu, R. S. [National Taiwan University > > > > > >]
	Ausloos, Marcel [Université de Liège - ULg > Département de physique > Physique statistique appliquée et des matériaux >]
Publication date :	May-2007
Journal title :	Journal of Applied Physics
Publisher :	Amer Inst Physics
Volume :	101
Issue/season :	10
Pages :	103904
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0021-8979
City :	Melville
Keywords :	[en] magnetocaloric effect ; manganites ; magnetic measurements
Abstract :	[en] The magnetocaloric effect in magnetic materials is of great interest nowadays. In this article we present an investigation about the magnetic properties near the magnetic transition in a polycrystalline sample of a manganite Tb0.9Sn0.1MnO3. Particularly, we are interested in describing the nature of the magnetic interactions and the magnetocaloric effect in this compound. The temperature dependence of the magnetization was measured to determine the characteristics of the magnetic transition and the magnetic entropy change was calculated from magnetization curves at different temperatures. The magnetic solid is paramagnetic at high temperatures. We observe a dominant antiferromagnetic interaction below T-n=38 K for low applied magnetic fields; the presence of Sn doping in this compound decreases the Neel temperature of the pure TbMnO3 system. A drastic increase in the magnetization as a function of temperature near the magnetic transition suggests a strong magnetocaloric effect. We found a large magnetic entropy change Delta S-M(T) of about -4 J/kg K at µ0H=3 T. We believe that the magnetic entropy change is associated with the magnetic transition and we interpret it as due to the coupling between the magnetic field and the spin ordering. This relatively large value and broad temperature interval (about 35 K) of the magnetocaloric effect make the present compound a promising candidate for magnetic refrigerators at low temperatures. (c) 2007 American Institute of Physics.
Research units :	Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Funders :	Fonds de la Recherche Fondamentale Collective d’Initiative des Chercheurs - FRFC ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Commissariat Général aux Relations internationales - CGRI ; Ministry of Science and Higher Education of Poland ; Kasa Mianowskiego (Poland)
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/1744
DOI :	10.1063/1.2732453
Other URL :	http://link.aip.org/link/?JAPIAU/101/103904/1
Commentary :	Copyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 101, 103904 (2007) and may be found at http://link.aip.org/link/?JAPIAU/101/103904/1.

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