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2012 | 121 | 5-6 | 1082-1084
Article title

Strongly Correlated Electron Behaviour in CeT_2Al_8 (T~=~Fe,~Co)

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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.
  • Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
  • Physics Department, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
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