Title :
Crystal structure and thermoelectric properties of novel skutterudites EpyNi4Sb12-xSnx with Ep=Sn, Eu and Yb
Author :
Berger, St ; Paul, Ch ; Michor, H. ; Bauer, E. ; Hilscher, G. ; Grytsiv, A. ; Rogl, P.
Author_Institution :
Tech. Univ. Wien, Wien, Austria
Abstract :
A novel ternary phase, SnyNi4Sb12-xSnx has been characterised exhibiting a wide range of homogeneity (at 250°C. 2.4≤x≤5.6; 0≤y≤0.31). SnyNi4Sb12-xSnx crystallises in a skutterudite based structure in which Sn atoms are found to occupy both the 24 g site randomly sharing with Sb atoms and the 2a position, with an anomalously large isotropic atomic displacement parameter. Eu0.8Ni4Sb5.8Sn6.2, Yb0.6Ni4Sb6.7Sn5.3 and Ni4As9.1Ge2.9 are isotypic skutterudites. Depending on the particular composition, metallic as well as semiconducting behaviour was observed. Eu containing compounds exhibit long range magnetic order arising from the Eu2+ ground state.
Keywords :
antimony alloys; crystal structure; europium alloys; nickel alloys; thermoelectricity; tin alloys; ytterbium alloys; 250 degC; Eu0.8Ni4Sb5.8Sn6.2; Ni4As9.1Ge2.9; SnNi4Sb12Sn; Yb0.6Ni4Sb6.7Sn5.3; crystal structure; long range magnetic order; metallic behaviour; semiconducting behaviour; skutterudites; ternary phase; thermoelectric properties; Annealing; Crystallization; Lattices; Magnetic materials; Nickel; Powders; Temperature; Thermoelectricity; Tin; X-ray diffraction;
Conference_Titel :
Thermoelectrics, 2002. Proceedings ICT '02. Twenty-First International Conference on
Print_ISBN :
0-7803-7683-8
DOI :
10.1109/ICT.2002.1190262
