Magnetic ions embedded in a nonmagnetic host exhibit a number of unusual low-
temperature properties known collectively as the Kondo effect. Conventional small …

Publisher Summary Heavy-fermion compounds exhibit a considerably more stable 4f
configuration, although the 4f occupancy still deviates slightly from integral values. They …

A central issue in material science is to obtain understanding of the electronic correlations
that control complex materials. Such electronic correlations frequently arise because of the …

A survey of experimental findings for Ce-Cu-and Yb-Cu-based compounds is given. Most of
these compounds exhibit unusual physical properties as a consequence of various …

We have performed inelastic-neutron-scattering experiments on single crystals of the heavy-
fermion compound CeRu 2 Si 2. At intermediate temperatures (25 K< T< 90 K) the magnetic …

Elastic and inelastic neutron scattering studies of the Kondo lattice CeCu 2 Ge 2 were
performed. At TN= 4.1 K an incommensurate magnetic order develops with an ordering …

The T 2-coefficient of the electrical resistivity, A, is compared with the electronic specific heat
coefficient, γ, for a number of Yb-based compounds. It is revealed that many systems …

The development and applications of approximations for the electronic properties of
intermediate valence and heavy fermion systems within the last six years is reviewed. The …

We compare the results of measurements of the magnetic susceptibility χ (T), the linear
coefficient of specific heat γ (T)= C (T)/T, and 4 f occupation number nf (T) for the …

Magnetic excitations of the filled skutterudite Pr Ru 4 P 12 exhibiting a metal-insulator (MI)
transition at TM-I= 63 K were studied by inelastic neutron scattering experiment. The spectra …