Publication Date

10-24-2020

Department

Ames Laboratory; Materials Science and Engineering

Campus Units

Materials Science and Engineering, Ames Laboratory

OSTI ID+

1706638

Report Number

IS-J 10354

DOI

10.1016/j.jallcom.2020.157682

Journal Title

Journal of Alloys and Compounds

First Page

157682

Abstract

We describe magnetic, thermal, and magnetocaloric properties of rare earth intermetallic compounds TmxDy1−xAl2 with 𝑥 = 0.25, 0.5 and 0.75. Using model Hamiltonian we consider contributions of the crystalline electric field anisotropy in both Tm and Dy magnetic sublattices, disorder in exchange interactions among Tm-Tm, Dy-Dy and Tm-Dy magnetic ions, and the Zeeman effect. Employing earlier reported and new experimental measurements, we first determine a single free variable – the intersublattice magnetic exchange parameter – to properly model the temperature and magnetic field dependencies of heat capacity and magnetization, and then use the modeling results to explain the emergence of an anomalous spin reorientation transition and its influence on the magnetocaloric effect in the title compounds. Theoretical results agree with experimental data reasonably well.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Publisher

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

Available for download on Sunday, October 24, 2021

Included in

Metallurgy Commons

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