Publication Date

4-6-2019

Department

Ames Laboratory

Campus Units

Ames Laboratory

OSTI ID+

1526284

Report Number

IS-J 9948

DOI

10.1016/j.jmmm.2019.04.021

Journal Title

Journal of Magnetism and Magnetic Materials

Volume Number

484

First Page

456

Last Page

461

Abstract

In this work, we report the magnetic dilution effect on the magnetic and magnetocaloric properties of (Gd1-xYx)(2)NiSi3 (x = 0.25, 0.5, 0.75) compounds by partial substitution of Y ions in Gd2NiSi3. The X-ray diffraction studies indicate all theses compounds form in AlB2 type hexagonal crystal structure. The dc magnetic measurements reveal the compounds undergo antiferromagnetic like phase transition below 11.5, 7.2, and 3.1 K for x = 0.25, 0.5 and 0.75 compositions, respectively. The magnetic ground state of the compounds becoming increasingly fragile with the increase in Y concentration, and results in magnetic field induced ferromagnetic transition. Such change in magnetic spin configuration is responsible for moderately large magnetic entropy change (Delta S-M (similar to)19.3 J/kg-K, 14.8 J/kg-K and 9.8 J/kg-K for x = 0.25, 0.5, and 0.75, respectively, for Delta H = 7T) in the cryogenic temperature region. The relative cooling power (RCP) has also been estimated for all the compounds that appears to be modest ((similar to)503 J/kg for 7T magnetic field change) for x = 0.25 analogue and reduces further with magnetic dilution effect caused by Y substitution.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Publisher

Iowa State University Digital Repository, Ames IA (United States)

Available for download on Monday, April 06, 2020

Included in

Metallurgy Commons

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