Year: 2018
Type: article
Abstract: We performed elemental analysis and transport measurements (resistivity and Seebeck coefficient) in single crystal clathrate samples with starting compositions Ba8GayMzGe46-y-z (M = Au, Ag) and Ba8-xRxGayAgzGe46-y-z (R = La, Ce, Eu). Electron-probe microanalysis (EPMA) indicated that no trivalent rare earths (La and Ce) were incorporated into the germanium clathrates, neither with gold or silver as acceptors; the former was included in large amounts, in contrast to the latter, which nonetheless allowed the inclusion of small amounts of Eu. Transport measurements did not show significant improvement in the thermoelectric properties in singlecrytalline Au-clathrate samples compared to their known polycrystalline correspondents. The Ag-clathrates showed very similar thermoelectric properties with or without the inclusion of Eu.
Source: Results in Physics
Institutions: Universidade Federal do ABC, Hiroshima University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,920
OpenAlex ID: W2897756015