Influence of nickel paramagnetic impurity on the softening of lead during the superconducting transition
Abraimov V.V. , Soldatov V.P., Startsev V.I.
It is shown that introduction of a nickel paramagnetic impurity in lead leads to a considerable decrease of the softening of the metal during the superconducting transition. This may be due to the strong influence of the paramagnetic atoms on the spectrum of the electronic excitations in the superconductor.