Kondo ground state ofCeCoGe2withj=52

Electronic structure of RCoxGe2 (R=Ce, Pr, Gd) compounds

“…Also absence of the satellites of the Co 2p 3/2 state suggests that in these compounds there is no localized magnetic moment on the Co atoms. This is in agreement with the magnetic data which indicate that the magnetic moment is localized only on the rare earth elements [5][6][7].…”

“…• The large intensity on the Fermi level in CeCo 0.89 Ge 2 is in good agreement with the heavy-fermion behavior this compound [4,5].…”

“…Study for nonstoichiometric sample CeCo 0.89 Ge 2 indicating a heavyfermion and valence fluctuating behavior [4]. The magnetic ordering is observed to be absent at temperature down to 1.5 K. New results of the magnetic susceptibility, specific heat and electrical resistivity of stoichiometric CeCoGe 2 confirm a heavy-fermion and Kondo-lattice behavior [5]. The new magnetic data indicate that PrCo 0.85 Ge 2 and GdCo 0.64 Ge 2 compounds are antiferromagnets with the Néel temperature equal 5 K for R=Pr [6] and 10 K for R=Gd [7].…”

Magnetic, electric and thermoelectric properties of ternary intermetallics from the Ce–Co–Ge system

“…1(c), CeCo 0.86 Ge 2 remains paramagnetic at least down to 2 K, in agreement with Refs. [4,5]. As a consequence, its magnetization increases quasi-linearly (and without any hysteresis) with increasing the magnetic field at least up to 5 T, and the magnetic moment at 5 T is as small as 0.11 m B /mol Ce .…”

Low temperature neutron diffraction data for CeCo0.86Ge2

“…The magnetic moments of the trivalent Ce 3+ do not order up to 1.8 K [12,13]. This work reports the results of neutron diffraction measurements at low temperatures (1.5 K) carried out to understand the nature of magnetic properties CeCo 0.86 Ge 2 in this temperature range.…”