Specific features in the magnetic properties of CeCoAl4

Strongly Correlated Electron Behaviour in CeT2Al8(T = Fe, Co)

“…4. The results are in fair comparison with the available literature [2,5]. A ρ 4f (T ) ∼ − log T dependence of the 4f -electron derived ρ(T ) is found at higher temperatures (see solid lines in insets), a form of scattering that originates in incoherent Kondo-type scattering of charge carriers from local moments.…”

“…The ndings on CeFe 2 Al 8 that lead Koterlin et al [2] to conclude that the magnetism in this compound is governed by intermediate valence arising from strong cf hybridization prompted Mössbauer [3] and neutron diraction [4] studies to investigate aspects of the ground state. Electrical resistivity and thermoelectric studies [5] lead to characterizing CeCo 2 Al 8 as a Kondo lattice. In the present work, we extend investigations into the pair of compounds CeFe 2 Al 8 and CeCo 2 Al 8 by means of specic heat, magnetization, and electrical resistivity studies.…”

“…Exploratory magnetic properties of X = Al and Ga derivatives were reported [1,2] after formation of the nominal CeT 2 X 8 stoichiometry type was established. The ndings on CeFe 2 Al 8 that lead Koterlin et al [2] to conclude that the magnetism in this compound is governed by intermediate valence arising from strong cf hybridization prompted Mössbauer [3] and neutron diraction [4] studies to investigate aspects of the ground state.…”

Reinvestigation of the Ce–Co–Al ternary system: Isothermal section at 973K

“…Ce 2 Co 6 Al 19 is also non magnetic and exhibits a non-Fermi liquid behavior [8]. CeCoAl 4 orders antiferromagnetically at T N % 13 K and presents the occurrence of Kondo-like interactions despite a small value of its Sommerfeld coefficient [9][10][11][12]. CeCoAl follows a Curie-Weiss law above 60 K but strongly deviates from it at lower temperature, without well characterized magnetic ordering [13].…”

“…CeCoAl 4 orders antiferromagnetically at T N % 13 K and presents the occurrence of Kondo-like interactions despite a small value of its Sommerfeld coefficient [9][10][11][12]. CeCoAl follows a Curie-Weiss law above 60 K but strongly deviates from it at lower temperature, without well characterized magnetic ordering [13]. Another intermetallic compound, namely Ce 3 Co 3 Al 4 has been reported [14] but its electronic properties are, to the best of the author's knowledge, undetermined.…”