  A new critical behavior in unconventional superconductors and superfluids is
established and described by the Wilson-Fisher renormalization-group method.
For certain symmetries of order a new type of fluctuation-driven first order
phase transitions at finite and zero temperature are predicted. The results can
be applied to a wide class of ferromagnetic superconductive and superfluid
systems, in particular, to itinerant ferromagnets as UGe_2 and URhGe.
