Heavy fermion behaviour in lanthanide and actinide materials

Sechovský, V.; Havela, L.

doi:10.1016/0925-8388(94)07050-4

Cited by 6 publications

(1 citation statement)

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“…Furthermore it increases from sto pand to d-ligand shells. Accordingly, hybridization in binary Ce-Rh and ternary Ce-Rh-X compounds (X: p element), with one hole in the 4d Rh shell, is always significantly larger than in homologous compounds, binary Ce-Pd and Ce-Pd-X, where the 4d Pd states are almost completely filled [49,51]. Thus it is not surprising that in CeRh 1−x Pd x the local T K is strongly decreasing with the ratio between the number of nearest Rh and Pd neighbors.…”

Section: B Role Of Disordermentioning

confidence: 99%

Site dependence of the Kondo scale inCePd1−xRhxdue to Pd-Rh disorder

et al. 2015

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We present measurements of the thermopower S(T ) on CePd 1−x Rh x between 2 K and 300 K. For low Rh content, the system behaves as a ferromagnetic Kondo system with a Curie temperature T C of about 6 K, a Kondo scale smaller than T C , and an overall crystal electric field splitting of 210 K. As the Rh content increases T C is suppressed, while the average Kondo scale gets larger. Simultaneously, the presence of different Ce environments leads to a broad distribution of local Kondo scales ranging from very small values to above 50 K. As a consequence, large thermopower values are observed over an extended temperature range. Close to the critical concentration we find power-law dependencies of S/T vs T down to 2 K. For a Rh content of x = 0.95 we may show explicitly that the thermopower contains contributions from Ce sites with different local energy scales.

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Section: B Role Of Disordermentioning

confidence: 99%