Magnetocaloric effect near a second-order magnetic phase transition

TitleMagnetocaloric effect near a second-order magnetic phase transition
Publication TypeJournal Article
Year of Publication2007
AuthorsTishin AM, Derkach AV, Spichkin YI, Kuz'min MD, Chernyshov AS, Gschneidner KA, Pecharsky VK
Journal TitleJournal of Magnetism and Magnetic Materials
Volume310
Pages2800-2804
Date PublishedMar
Type of ArticleArticle
ISBN Number0304-8853
Accession NumberISI:000247720400309
KeywordsGADOLINIUM, magnetic phase transitions, magnetization, magnetocaloric effect
Abstract

The temperature and magnetic. field dependences of the magnetocaloric effect (adiabatic temperature change DT) were measured in single crystalline and polycrystalline Gd near the Curie point (T-C) using direct method with continuously changing magnetic field (H) at different rates and the more conventional stepping of the magnetic. eld. The peculiarities in Delta T(H) behavior are discussed. The Curie temperature of Gd was obtained by means of Belov-Goryaga (Arrott) plots on the basis of magnetization and magnetocaloric data, and from AC susceptibility measurements. The differences in the obtained values and possible reasons of the differences are discussed. (C) 2006 Elsevier B. V. All rights reserved.

DOI10.1016/j.jmmm.2006.10.1056
Alternate JournalJ. Magn. Magn. Mater.