The magnetic-non magnetic transition of cerium impurities in lanthanum-thorium based alloys
1974; Elsevier BV; Volume: 14; Issue: 11 Linguagem: Inglês
10.1016/0038-1098(74)90280-4
ISSN1879-2766
AutoresFrédéric Meunier, Simón Hernández‐Ortega, O. Peña, Marco Roth, B. Coqblin,
Tópico(s)Magnetic Properties of Alloys
ResumoAbstract A simple theoretical model which assumes a linear increase with thorium concentration for the cerium 4ƒ level with respect to the Fermi level can explain both the decrease ΔT c c of the superconducting temperature and the logarithmic slope d ρ c dln T of the Kondo resistivity in LaTh based alloys with cerium impurities. The model yields two different maxima for | d ρ c dln T | and ΔT c c , the second one of which occurs when the resistivity minimum disappears, in very good agreement with experimental data.
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