Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81410
Type: Artigo de periódico
Title: Magnetic coupling between Gd and Pr ions and magnetocaloric effect in Gd0.5Pr0.5Al2 compound
Author: Carvalho, AMG
Garcia, F
de Sousa, VSR
von Ranke, PJ
Rocco, DL
Loula, GD
de Carvalho, EJ
Coelho, AA
da Silva, LM
Gandra, FCG
Abstract: In this work, we report the theoretical and experimental investigations on the magnetic and magnetocaloric properties for Gd0.5Pr0.5Al2 compound in different magnetic fields. The magnetization features Gd0.5Pr0.5Al2 is ferrimagnetic at low temperatures. We also present data from X-ray magnetic circular dichroism (XMCD) experiments for this compound, with which we have confirmed that the magnetic moments of the Pr ions are antiparallel to the magnetic moments of the Gd ions. The magnetocaloric parameters, Delta T-S and Delta S-T, were obtained from calorimetric data and both curves present normal and inverse magnetocaloric effect. A theoretical model for ferrimagnetic coupling, including the crystalline electrical field anisotropy, was used to describe the Delta T-S and Delta S-T experimental results. (C) 2009 Elsevier B.V. All rights reserved.
Subject: Rare-earth alloy
X-ray magnetic circular dichroism
Ferrimagnetism
Magnetocaloric effect
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2009.04.068
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000268022700008.pdf547.01 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.