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An Electrical Resistivity Study of Ce₂Fe₁₆.₈ and the Ce₂Fe₁₇₋ₓAlₓ and Ce₂Fe₁₇₋ₓSiₓ Solid Solutions
Journal of Applied Physics
  • Denis Vandormael
  • Fernande Grandjean, Missouri University of Science and Technology
  • Hassan Bougrine
  • Marcel R. Ausloos
  • D. P. Middleton
  • K. H. J. Buschow
  • Gary J. Long, Missouri University of Science and Technology
Abstract

Electrical resistivity measurements have been carried out between 20 and 300 K on Ce2Fe16.8, on the Ce2Fe17-xAlx. solid solutions, with x = 0.4, 1, 2, 5, 6, 8, and 9, and on the Ce2Fe17-xSix solid solutions, with x = 0.2, 0.4, 1, and 2, with the four probe method. The temperature dependence of the resistivity of Ce2Fe16.8 shows an inflection at 110 K, a feature which is also observed in the temperature dependence of the magnetization and is related to a magnetic phase transition from a helical structure, above 110 K, to a fan structure, below 110 K. The temperature dependence of the resistivity of Ce2Fe16.8 is characteristic over the investigated temperature range of weak antiferromagnetic behavior with incommensurate periodicity as has been observed in the earlier neutron diffraction study. The resistivity of Ce2Fe17-x-Alx. increases with temperature in agreement with a density of states at the Fermi level dominated by the d band. For a given temperature, the resistivity increases substantially and regularly with x for both series of solid solutions because of an increase in the number of conduction electron scattering potentials. This increase in resistivity also corresponds to a decrease in the number of conduction electrons due to their increasing transfer into the localized cerium 4f orbitals as the cerium valence state changes from a mixture of trivalent and tetravalent in Ce2Fe17 to predominantly trivalent in Ce2Fe17-xAlx. and Ce2Fe17-xSix with increasing x.

Department(s)
Chemistry
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 1997 American Institute of Physics (AIP), All rights reserved.
Publication Date
3-1-1997
Publication Date
01 Mar 1997
Disciplines
Citation Information
Denis Vandormael, Fernande Grandjean, Hassan Bougrine, Marcel R. Ausloos, et al.. "An Electrical Resistivity Study of Ce₂Fe₁₆.₈ and the Ce₂Fe₁₇₋ₓAlₓ and Ce₂Fe₁₇₋ₓSiₓ Solid Solutions" Journal of Applied Physics Vol. 81 Iss. 6 (1997) p. 2643 - 2645 ISSN: 0021-8979
Available at: http://works.bepress.com/fernande-grandjean/95/