On the determination of the magnetic entropy change in materials with first-order transitions

dc.creatorCaron, L
dc.creatorOu, ZQ
dc.creatorNguyen, TT
dc.creatorThanh, DTC
dc.creatorTegus, O
dc.creatorBruck, E
dc.date2009
dc.dateNOV
dc.date2014-11-13T12:55:08Z
dc.date2015-11-26T18:07:24Z
dc.date2014-11-13T12:55:08Z
dc.date2015-11-26T18:07:24Z
dc.date.accessioned2018-03-29T00:49:33Z
dc.date.available2018-03-29T00:49:33Z
dc.identifierJournal Of Magnetism And Magnetic Materials. Elsevier Science Bv, v. 321, n. 21, n. 3559, n. 3566, 2009.
dc.identifier0304-8853
dc.identifierWOS:000269721100006
dc.identifier10.1016/j.jmmm.2009.06.086
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/81698
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/81698
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/81698
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1293584
dc.descriptionAn accurate method to determine the magnetic entropy change in materials with hysteretic first-order transitions is presented, which is needed to estimate their potential for applications. We have investigated the effect of the maximal entropy change derived from magnetization measurements performed in different measurement processes. The results show that the isothermal entropy change can be derived from the Maxwell relations even for samples with large thermal hysteresis. In the temperature region with hysteresis, over estimating the entropy change can be avoided by measuring the isothermal magnetization of the sample after it is cooled from the paramagnetic state to the measurement temperature. In this way the so-called peak effect is not observed as shown here for a few compounds. (C) 2009 Elsevier B.V. All rights reserved.
dc.description321
dc.description21
dc.description3559
dc.description3566
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationJournal Of Magnetism And Magnetic Materials
dc.relationJ. Magn. Magn. Mater.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectMagnetization process
dc.subjectMagnetic entropy
dc.subjectFirst-order transition
dc.subjectMagnetic refrigeration
dc.subjectAdiabatic Temperature-change
dc.subjectMetamagnetic Transition
dc.subjectGd-5(si2ge2)
dc.subjectGd5si2ge2
dc.subjectCompound
dc.titleOn the determination of the magnetic entropy change in materials with first-order transitions
dc.typeArtículos de revistas


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