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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2019

Magnetocaloric effect of gadolinium in high magnetic fields

Résumé

The magnetocaloric effect of gadolinium has been measured directly in pulsed magnetic fields up to 62 T. The maximum observed adiabatic temperature change is T ad = 60.5 K, the initial temperature T 0 being just above 300 K. The field dependence of 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 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, μ 0 H 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 .
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Dates et versions

hal-02339629 , version 1 (30-10-2019)

Identifiants

Citer

T. Gottschall, M D Kuz'Min, K. P Skokov, Y. Skourski, M. Fries, et al.. Magnetocaloric effect of gadolinium in high magnetic fields. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2019, 99 (13), ⟨10.1103/PhysRevB.99.134429⟩. ⟨hal-02339629⟩
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