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Transport properties in the pseudobinary (Gd, Y) Al2 series

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Zeitschrift für Physik B Condensed Matter

Abstract

The temperature dependence of the electrical resistivity, the thermal conductivity and the thermopower of the cubic isostructural (GdxY1−x)Al2 series will be presented. The magnetic properties of this system are characterized by the existence of ferromagnetism for Gd concentrations x>0.3 while for low Gd contents cluster and spinglass behaviour is observed. The spin dependent scattering contribution to the transport phenomena has been obtained by comparing the experimental data of the magnetic compounds with those of the isostructural nonmagnetic YAl2. For the ferromagnetic concentration range and forT>T c (T c =Curie temperature) we revealed a temperature independent contribution to the electrical resistivity, a contribution with a temperature variation of 1/T to the thermal resistivity and a linear temperature dependence of this part to the thermopower. These results are in good agreement with the temperature dependence calculated by solving the linearized Boltzmann equation for this type of scattering processes.

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Authors and Affiliations

  1. Institut für Experimentalphysik, Technische Universität Wien, Karlsplatz 13, A-1040, Wien, Austria

    E. Bauer, E. Gratz & H. Kirchmayr

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  1. E. Bauer
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  2. E. Gratz
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  3. H. Kirchmayr
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Bauer, E., Gratz, E. & Kirchmayr, H. Transport properties in the pseudobinary (Gd, Y) Al2 series. Z. Physik B - Condensed Matter 68, 63–71 (1987). https://doi.org/10.1007/BF01307865

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  • DOI: https://doi.org/10.1007/BF01307865

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