Structure and physical properties of the thermoelectric skutterudites EuyFe4-xCoxSb12 -: art. no. 094411

被引：51

作者：

Grytsiv, A

Rogl, P

Berger, S

Paul, C

Bauer, E

Godart, C

Ni, B

Abd-Elmeguid, MM

Saccone, A

Ferro, R

Kaczorowski, D

机构：

[1] Univ Vienna, Inst Phys Chem, A-1090 Vienna, Austria

[2] Vienna Univ Technol, Inst Festkorperphys, A-1040 Vienna, Austria

[3] ISCSA, CNRS, UPR209, F-94320 Thiais, France

[4] Univ Paris 11, CNRS, LURE, F-91405 Orsay, France

[5] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[6] Univ Genoa, Dipartimento Chim & Chim Ind, Sez Chim Inorgan & Met, I-16146 Genoa, Italy

[7] Polish Acad Sci, W Trzebiatowski Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.66.094411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compounds from the solid solution EuyFe4-xCoxSb12 were synthesized and found to crystallize in the partially filled skutterudite-type structure LaFe4P12. The maximal Eu content gradually decreases from practically full occupancy y=0.83 in Eu0.83Fe4Sb12 to y=0.44 for Eu0.44Co4Sb12. As a function of Fe/Co substitution in EuyFe4-xCoxSb12 the magnetic transition temperature decreases from 84 K for Eu0.83Fe4Sb12 to 8 K for Eu0.44Co4Sb12. At lower Eu content, Eu0.2Co4Sb12, long-range magnetic order disappears. Concomitantly, the Eu valence changes from almost divalent Eu in Eu0.83Fe4Sb12 to nuapproximate to2.6 for Eu0.2Co4Sb12. The transition metal exchange Fe/Co reduces the number of free carriers and causes a crossover of the electronic transport from a hole conductivity regime into electron dominated behavior. Thermoelectric properties change accordingly.

引用

页码：944111 / 9441111

页数：11

共 36 条

[1] VOLUME DEPENDENCE OF MAGNETIC HYPERFINE FIELDS IN EU-INTERMETALLIC COMPOUNDS [J].