Thermoelectric Properties of YMn4+xAl8-x, -2 ≤ x ≤ 2.5
Artikel i vetenskaplig tidskrift, 2009

Seven samples within the series YMn 4+x Al 8 - x (-2.0 ≤ x ≤ 2.5) were synthesized using direct reaction of the elements. The thermoelectric properties of the samples were characterized by measurements of resistivity, thermal conductivity and thermopower. According to transport measurements, slight Mn-deficiency influences the electronic conductivity of the YMn 4+x Al 8 - x system, implying that the electronic structure is marginal to the metal-semiconductor boundary. Furthermore, the ZT values of the samples prepared in this study were low. Experimental results indicated that structurally ordered YMn 4 Al 8 shows metallic conductivity, whereas off-stoichiometric compounds displayed semiconductor-like behavior, at low temperatures. © 2008 Elsevier B.V. All rights reserved.

Författare

Ali Saramat

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anders Palmqvist

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Anders Bentien

Max Planck-institutet

Journal of Alloys and Compounds

0925-8388 (ISSN)

Vol. 477 51-54

Ämneskategorier

Övrig annan teknik

Metallurgi och metalliska material

Den kondenserade materiens fysik

DOI

10.1016/j.jallcom.2008.10.165