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Languages of publication
Abstracts
We report on studies of physical properties of the two compounds CeFe_2Al_8 and CeCo_2Al_8 in which we have found varying degrees of electronic correlational phenomena. No magnetic ordering was detected down to 0.4 K in either of the two compounds. At elevated temperatures an incoherent Kondo interaction between the Ce 4f-electron and the conduction electrons is prevalent in both compounds. CeCo_2Al_8 exhibits a stable 4f-electron magnetic moment, but in CeFe_2Al_8 an intermediate-valent state prevails near room temperature that eventually transforms into a Fermi-liquid ground state. The low-temperature specific heat of CeCo_2Al_8 shows typical strongly correlated electron behaviour and a - logT upturn in its electronic specific heat below about 10 K.
Discipline
- 71.27.+a: Strongly correlated electron systems; heavy fermions
- 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
- 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)
- 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)
Journal
Year
Volume
Issue
Pages
1082-1084
Physical description
Dates
published
2012-05
Contributors
author
- Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
author
- Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p27kz