A number of recent measurements of this behaviour are discussed, and it is pointed out that there are two features of interest. One is a peak effect somewhat below H C2 of the type seen in some other type-II superconductors. The other is a so far unique excess magnetization (over that in the normal state) in a reversible region immediately below H C2 . It is speculated that the latter may be associated with the loss in the superconducting state of a Kondo compensation of Ce moments.
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Roy et al. (1994) studied this question.
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