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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleOn the determination of the magnetic entropy change in materials with first-order transitionspt_BR
dc.contributor.authorCaron, Lpt_BR
dc.contributor.authorOu, ZQpt_BR
dc.contributor.authorNguyen, TTpt_BR
dc.contributor.authorThanh, DTCpt_BR
dc.contributor.authorTegus, Opt_BR
dc.contributor.authorBruck, Ept_BR
unicamp.authorCaron, L. Ou, Z. Q. Nguyen, T. T. Thanh, D. T. Cam Tegus, O. Bruck, E. Delft Univ Technol, Fac Sci Appl, NL-2629 JB Delft, Netherlandspt_BR
unicamp.authorCaron, L. Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazilpt_BR
unicamp.authorOu, Z. Q. Tegus, O. Inner Mongolia Normal Univ, Key Lab Phys & Chem Funct Mat, Hohhot 010022, Peoples R Chinapt_BR
dc.subjectMagnetization processpt_BR
dc.subjectMagnetic entropypt_BR
dc.subjectFirst-order transitionpt_BR
dc.subjectMagnetic refrigerationpt_BR
dc.subject.wosAdiabatic Temperature-changept_BR
dc.subject.wosMetamagnetic Transitionpt_BR
dc.description.abstractAn 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
dc.relation.ispartofJournal Of Magnetism And Magnetic Materialspt_BR
dc.relation.ispartofabbreviationJ. Magn. Magn. Mater.pt_BR
dc.publisherElsevier Science Bvpt_BR
dc.identifier.citationJournal Of Magnetism And Magnetic Materials. Elsevier Science Bv, v. 321, n. 21, n. 3559, n. 3566, 2009.pt_BR
dc.sourceWeb of Sciencept_BR
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