An electrical resistivity study of Ce{sub 2}Fe{sub 16.8} and the Ce{sub 2}Fe{sub 17{minus}x}Al{sub x} and Ce{sub 2}Fe{sub 17{minus}x}Si{sub x} solid solutions

Journal Article · Sat Mar 01 00:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.363928· OSTI ID:502712

Vandormael, D; Grandjean, F ^[1]; Bougrine, H; Ausloos, M ^[2]; Middleton, D P ^[3]; Buschow, K H ^[4]; Long, G J ^[5]

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1. Group MAGNET, Institute of Physics, B5, University of Liege, B-4000 Sart-Tilman (Belgium)
2. S.U.P.R.A.S., Institute of Physics, B5, University of Liege, B-4000 Sart-Tilman (Belgium)
3. Philips Research Laboratories, NL-5600 JA Eindhoven (the Netherlands)
4. Van der Waals-Zeeman Institute, University of Amsterdam, NL-1018 XE Amsterdam (the Netherlands)
5. Department of Chemistry, University of Missouri-Rolla, Rolla, Missouri 65409-0010 (United States)

Electrical resistivity measurements have been carried out between 20 and 300 K on Ce{sub 2}Fe{sub 16.8}, on the Ce{sub 2}Fe{sub 17{minus}x}Al{sub x} solid solutions, with x=0.4, 1, 2, 5, 6, 8, and 9, and on the Ce{sub 2}Fe{sub 17{minus}x}Si{sub x} solid solutions, with x=0.2, 0.4, 1, and 2, with the four probe method. The temperature dependence of the resistivity of Ce{sub 2}Fe{sub 16.8} 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 Ce{sub 2}Fe{sub 16.8} 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 Ce{sub 2}Fe{sub 17{minus}x}Al{sub x} increases with temperature in agreement with a density of states at the Fermi level dominated by the {ital d} band. For a given temperature, the resistivity increases substantially and regularly with {ital 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 {ital 4f} orbitals as the cerium valence state changes from a mixture of trivalent and tetravalent in Ce{sub 2}Fe{sub 17} to predominantly trivalent in Ce{sub 2}Fe{sub 17{minus}x}Al{sub x} and Ce{sub 2}Fe{sub 17{minus}x}Si{sub x} with increasing {ital x}. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 502712
• Journal Information: Journal of Applied Physics, Vol. 81, Issue 6; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM ALLOYS
ELECTRIC CONDUCTIVITY
IRON BASE ALLOYS
ALUMINIUM ALLOYS
SILICON ALLOYS
PERMANENT MAGNETS
FERROMAGNETIC MATERIALS
ANTIFERROMAGNETIC MATERIALS
FERMI LEVEL
THERMOELECTRICITY
MAGNETORESISTANCE
SOLID SOLUTIONS
TEMPERATURE DEPENDENCE
MAGNETIZATION
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
PHASE TRANSFORMATIONS