Magnetic and magnetocaloric properties of the new R3Co4+xAl12-x (R: Tb → Er) with the Gd3Ru4Al12 structure-type

被引：9
作者：
Pasturel, M. [1 ]
Nasri, N. [2 ]
Guizouarn, T. [1 ]
Belgacem, B. [2 ]
Ben Hassen, R. [2 ]
Tougait, O. [3 ]
Noel, H. [1 ]
机构：
[1] Univ Rennes 1, UMR CNRS 6226, Chim Solide & Mat, Inst Sci Chim Rennes, Campus Beaulieu,Bat 10A,263 Av Gen Leclerc, F-35042 Rennes, France
[2] Univ Tunis el Manar, ISSBAT, Unite Rech Chim Mat & Environm, 9 Av Dr Zoheir Safi, Tunis 1006, Tunisia
[3] Univ Lille, UMR CNRS 8181, Unite Catalyse & Chim Solide, F-59695 Villeneuve Dascq, France
来源：
INTERMETALLICS | 2017年 / 90卷
关键词：
Functional materials; Intermetallics (aluminide); Magnetic properties; X-ray diffraction; DISTORTED KAGOME LATTICE; GLASS-LIKE BEHAVIOR; TERNARY; U3CO4+XAL12-X; TRANSITION;
D O I：
10.1016/j.intermet.2017.07.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The novel intermetallics R3Co4,Al-12 (R = Tb -> Er) crystallize in the hexagonal Gd3Ru4Al12 structure-type where the rare earth atoms form a heavily distorted kagome network. Single crystal X-ray diffraction reveals an unusual 2b substitution site of Co for Al probably driven by steric effects. The four phases order ferromagnetically below 24.0, 17.4, 11.5 and 5.0 K for R = Tb, Dy, Ho and Er, respectively, linearly decreasing with the de Gennes factor of the rare earth. The magnetocaloric properties have been estimated for R = Ho and Er by measuring the magnetization isotherms at various temperatures. The magnetic entropy changes reach maximum values of -12 and -10 J kg(-1) k(-1) for a magnetic field change from 5 to 0 T.
引用
收藏
页码：74 / 80
页数：7
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