| Issue |
J. Phys. IV France
Volume 07, Number C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
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|
|---|---|---|
| Page(s) | C1-281 - C1-282 | |
| DOI | https://doi.org/10.1051/jp4:19971111 | |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-281-C1-282
DOI: 10.1051/jp4:19971111
1 University of Silesia, Institute of Physics, ul. Uniwersytecka 4, 40-007 Katowice, Poland
2 Universität Göttingen, IV. Physik Institut, Bunsenstr. 11-15, 37073 Göttingen, Germany
3 Silesian University, Institute of Chemistry, Szkolna 9, 40-007 Katowice, Poland
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-281-C1-282
DOI: 10.1051/jp4:19971111
The Thermoelectric Power of Ferromagnetically Ordered Cu1-xGaxCr2Se4 Spinels
T. Gron1, K. Bärner2, Ch. Kleeberg2 and I. Okonska-Kozlowska31 University of Silesia, Institute of Physics, ul. Uniwersytecka 4, 40-007 Katowice, Poland
2 Universität Göttingen, IV. Physik Institut, Bunsenstr. 11-15, 37073 Göttingen, Germany
3 Silesian University, Institute of Chemistry, Szkolna 9, 40-007 Katowice, Poland
Abstract
Single crystals of Cu1-xGaxCr2Se4 have been prepared using a chemical vapor method. The absolute thermoelectric power S and the electrical resistivity ρ of single crystals with compositions x = 0.036, 0.158, 0.374, 0.394, have been measured in the temperature range from 5 to 400K. Al1 compounds are p-type metallic conductors with the residual resistance increasing with increasing gallium concentration. The temperature dependence of the resistivity is almost constant for temperatures T < Tc and increases close to the Curie temperature Tc, indicating a spin scattering contribution. A broad hump ΔS(T) which goes to zero close to Tc apparently is superimposed on a linear diffusion thermopower, suggesting magnon drag.
© EDP Sciences 1997