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Studies On The Intermetallic Semiconductor RuAl2

Published online by Cambridge University Press:  10 February 2011

V. Ponnambalam  and
U. V. Varadaraju
V. Ponnambalam
Affiliation:
Materials Science Research Centre, Indian Institute of Technology Madras 600 036, INDIA
U. V. Varadaraju
Affiliation:
Materials Science Research Centre, Indian Institute of Technology Madras 600 036, INDIA
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Abstract

The intermetallic compound RuAl2 with Nowotny chimney-ladder structure is synthesized using arc melting technique. The electrical resistity and thermo electric power measurements were carried out in the temperature range 300–1000K. The resistivity increases with increasing temperature and reaches a maximum value at about 700K. Thermo electric power (TEP) of the sample is negative and the value is about -80 µV/K at RT. The value increases with increasing temperature reaching a maximum value of -140 µV/K at about 600K. The compound exhibits temperature independent power factor in the temperature range 300–550K The calculated figure of merit 1.3 × K-1 is comparable to 7 × 10-4 K-1 of Si-Ge alloys which are used as high temperature thermoelectric materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 512: Symposium F – Wide Bandgap Semiconductors for High Power, High Frequency , 1998 , 245
Copyright
Copyright © Materials Research Society 1998

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References

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