Magnetocaloric effect of gadolinium in high magnetic fields

被引：70

作者：

Gottschall, T. ^{[1
]}

Kuz'min, M. D. ^{[2
]}

Skokov, K. P. ^{[3
]}

Skourski, Y. ^{[1
]}

Fries, M. ^{[3
]}

Gutfleisch, O. ^{[3
]}

Zavareh, M. Ghorbani ^{[1
]}

Schlagel, D. L. ^{[4
]}

Mudryk, Y. ^{[4
]}

Pecharsky, V ^{[4
,5
]}

Wosnitza, J. ^{[1
,6
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD EMFL, D-01328 Dresden, Germany

[2] Aix Marseille Univ, IM2NP, UMR CNRS 7334, F-13397 Marseille 20, France

[3] Tech Univ Darmstadt, Inst Mat Wissensch, D-64287 Darmstadt, Germany

[4] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA

[5] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[6] Tech Univ Dresden, Festkorper & Mat Phys, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2019年 / 99卷 / 13期

关键词：

Magnetocaloric effects;

D O I：

10.1103/PhysRevB.99.134429

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：7

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