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Gd-5(SixGe1-x)(4) system - updated phase diagram

TitleGd-5(SixGe1-x)(4) system - updated phase diagram
Publication TypeJournal Article
Year of Publication2015
AuthorsMelikhov, Y, Hadimani, RL, Raghunathan, A
JournalJournal of Magnetism and Magnetic Materials
Date Published12
Type of ArticleArticle
ISBN Number0304-8853
Accession NumberWOS:000360025900019
KeywordsArrott Plot technique, Curie-Weiss law, First order magnetic-structural phase, Gd-5(SixGe1-x)(4) Phase diagram, Magnetocaloric, temperature, transition

0.5 is orthorhombic and ferromagnetic at lower temperature, monoclinic and paramagnetic at higher temperature, and shows a first order magnetic-structural phase transition between the two. In this range, the magnetic moment vs. magnetic field (MH) isotherms measured just above the first order transition temperature carry information about all magnetic and structural transitions. Here, the Curie-Weiss law was applied to the paramagnetic portions of the MH isotherms which allowed identification of the second order magnetic phase transition temperature of the monoclinic phase, a region where the second order transition does not occur due to the existence of the first order transition. The calculated second order phase transition temperatures of the monoclinic phase were added to the existing phase diagram. The completed magnetic-structural phase diagram carries now all the information including the magnetic transition temperatures of both monoclinic and orthorhombic phases It was also found that the magnetic transition temperature of the monoclinic phase and the first order transition temperature are interrelated. (C) 2015 Elsevier B.V. All rights reserved.

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