Abstract
We have shown so far that in van Vleck paramagnetic metals such as Pr indirect electron-electron interaction arises from virtual excitation of the crystal field singlet ground state. This effective interaction turns repulsive near the Fermi surface. We study the possible pairing mediated by the spin-fluctuation due to this repulsie interaction. For the conduction band where the conduction electron susceptibility takes a maximum at q=0, formal discussion can be made in parallel with the superfluidity in 3He. Among the spin triplet pairings crystal field anisotropy selects the most favorable state.
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