External pressure enhancement of the dense Kondo effect in a PdCe intermetallic compound

In order to clarify the effect of external pressure on the dense Kondo state, we have measured the electrical resistivity of a PdCe intermetallic compound in the temperature range 77–300 K under several pressures up to 7 GPa. The changes in electrical resistivity and lattice volume with pressure hav...

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Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 54; no. 1; pp. 131 - 134
Main Authors Umeo, Kazunori, Aya, Yoichiro, Itakura, Masaru, Kuwano, Noriyuki, Oki, Kensuke
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1993
Elsevier
Subjects
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
dense Kondo effect
electrical resistivity
Electronic conduction in metals and alloys
Electronic transport in condensed matter
Exact sciences and technology
high pressure
intermediate valence
lattice parameter
Metals. Metallurgy
Pd-Ce alloy
Physics
rare earth
dense Kondo effect
rare earth
intermediate valence
lattice parameter
Pd-Ce alloy
high pressure
electrical resistivity
Stoichiometry
Temperature
Electrical conductivity
Intermetallic compound
Cerium Palladium Alloys
Experimental study
Order disorder
Pressure
Kondo effect
Volume
Oxidation number
Binary alloy
Low temperature
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Summary:In order to clarify the effect of external pressure on the dense Kondo state, we have measured the electrical resistivity of a PdCe intermetallic compound in the temperature range 77–300 K under several pressures up to 7 GPa. The changes in electrical resistivity and lattice volume with pressure have been also examined at room temperature. It was found that the resistivity ratio of PdCe at room temperature increases with pressure P gradually to R(P) R(P a) = 1.75 until it reaches 7.7 GPa, where P a is the ambient pressure, and then shows a rapid increase to 2.5 at about 8.5 GPa, while the lattice volume decreases monotonically with pressure over the whole range up to 9.5 GPa. The resistivity ratio R(T) R(T R) at low temperatures T increases significantly as the pressure is raised. These experimental results show that the dense Kondo effect in PdCe is strongly enhanced by external pressure.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(93)90125-B