Publication Date

4-19-2019

Department

Ames Laboratory; Materials Science and Engineering

Campus Units

Ames Laboratory, Materials Science and Engineering

OSTI ID+

1514889

Report Number

IS-J 9935

DOI

10.1103/PhysRevB.99.134429

Journal Title

Physical Review B

Volume Number

99

Issue Number

13

First Page

134429

Abstract

The magnetocaloric effect of gadolinium has been measured directly in pulsed magnetic fields up to 62 T. The maximum observed adiabatic temperature change is Delta T-ad = 60.5 K, the initial temperature T-0 being just above 300 K. The field dependence of Delta T-ad is found to follow the usual H-2/3 law, with a small correction in H-4/3. However, as H is increased, a radical change is observed in the dependence of Delta T-ad on T-0, at H = const. The familiar caret-shaped peak situated at T-0 = T-C becomes distinctly asymmetric, its high-temperature slope becoming more gentle and evolving into a broad plateau. For yet higher magnetic fields, mu H-0 greater than or similar to 140 T, calculations predict a complete disappearance of the maximum near T-C and an emergence of a new very broad maximum far above T-C.

DOE Contract Number(s)

SPP 1599; HRSF-0045; AC02-07CH11358

Language

en

Publisher

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

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