|Title||Low temperature crystal structure and magnetic properties of RAl2|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Pathak, AK, Paudyal, D, Gschneidner, KA, Pecharsky, VK|
|Journal||Journal of Applied Physics|
|Type of Article||Article|
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.
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