Crystal Structure, Magnetic, Electronic, and Thermal Transport Properties of Ternary Compounds REReB4 (RE = Ce, Gd-Er, Yb)

被引：6

作者：

Abramchuk, Mykola ^{[1
]}

Schnelle, Walter ^{[1
]}

Veremchuk, Igor ^{[1
]}

Leithe-Jasper, Andreas ^{[1
]}

Grin, Yuri ^{[1
]}

Gumeniuk, Roman ^{[2
]}

机构：

[1] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[2] TU Bergakad Freiberg, Inst Phys Expt, D-09599 Freiberg, Germany

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2016年 / 01期

关键词：

Solid-state structures; Magnetic properties; Thermoelectricity; Electronic structure; THERMOELECTRIC PROPERTIES; PHYSICAL-PROPERTIES; YCRB4; BORIDES;

D O I：

10.1002/ejic.201501038

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Rare-earth rhenium borides REReB4 (RE = Ce, Gd-Er, Yb) were synthesized by various methods, including spark plasma sintering. They crystallize with the YCrB4 structure type (space group Pbam). The Tb, Ho, Er, and Yb representatives are Curie-Weiss paramagnets with the RE atoms in the +3 oxidation state, whereas the cerium atoms in CeReB4 are in the 4f(0) configuration (oxidation state +4). Electronic-structure calculations predict CeReB4 to be a metal with a density of states N(E-F) = 1.6 stateseV(-1)f.u.(-1) (f.u.: formula unit). Measurements of the transport properties confirm that REReB4 (RE = Ce, Tb, Ho) are metallic materials with low thermopowers and relatively high thermal conductivities.

引用

页码：161 / 168

页数：8

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