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Low temperature crystal structure and magnetic properties of RAl2

TitleLow temperature crystal structure and magnetic properties of RAl2
Publication TypeJournal Article
Year of Publication2014
AuthorsPathak, AK, Paudyal, D, Gschneidner, KA, Pecharsky, VK
JournalJournal of Applied Physics
Volume115
Pagination17e109
Date Published05
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000335643700482
Abstract

Low temperature crystal structure and magnetic properties of RAl2 (R = Pr and Nd) have been studied using temperature dependent powder x-ray diffraction, magnetization, and heat capacity measurements. Unlike PrAl2, NdAl2 retains cubic MgCu2-type structure from room temperature down to 5K, which is also confirmed from first principles electronic structure calculations. The magnetization measurements show both PrAl2 and NdAl2 order ferromagnetically at T-C = 32K and 77 K, respectively. However, the magnetization measurements show the former is a hard ferromagnet compared to the latter which is a soft ferromagnetic material. The magnetic entropy change obtained from heat capacity measurements at Delta H 30 kOe for PrAl2 and NdAl2 are 3.15 J mol(-1) K-1 and 1.18 J mol(-1) K-1, respectively. (C) 2014 AIP Publishing LLC.

DOI10.1063/1.4859096
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