Large Magnetic Entropy Change in GdRuSi Optimal for Magnetocaloric Liquefaction of Nitrogen

被引：11

作者：

Kuchin, Anatoly G. ^{[1
]}

Platonov, Sergey P. ^{[1
]}

Mukhachev, Roman D. ^{[1
]}

Lukoyanov, Alexey V. ^{[1
,2
]}

Volegov, Aleksey S. ^{[1
,3
]}

Gaviko, Vasilii S. ^{[1
,3
]}

Yakovleva, Mari Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, MN Mikheev Inst Met Phys, Ural Branch, Ekaterinburg 620108, Russia

[2] Ural Fed Univ, Inst Phys & Technol, Ekaterinburg 620002, Russia

[3] Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620026, Russia

来源：

METALS | 2023年 / 13卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

magnetic measurements; magnetocaloric effect; electronic structure; intermetallics; TO-LA-SM; ELECTRONIC-STRUCTURE; SI;

D O I：

10.3390/met13020290

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The search for new magnetocaloric materials for application in magnetic refrigerants is highly motivated by high efficiency, reliability, and environmental safety. The values of the magnetocaloric effect MCE and the refrigerant capacity RC for the equiatomic GdRuSi compound were determined to be MCE = 10.7 and 4.94 J/kgK and RC = 336 and 92 J/kg with a change in the field of 0-50 and 0-17 kOe, respectively. These high values of MCE and RC for GdRuSi appear in the region of nitrogen liquefaction temperature of 77.4 K, due to which the compound can be useful in practice. The densities of states and magnetic moments of GdRuSi were calculated theoretically, taking into account strong electron correlations in the 4f Gd shell. The total magnetic moment of GdRuSi was found to be composed of the Gd moment only with the value calculated in very good agreement with the experimental one.

引用

页数：9

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