  We address the quantum-critical behavior of a two-dimensional itinerant
ferromagnetic systems described by a spin-fermion model in which fermions
interact with close to critical bosonic modes. We consider Heisenberg
ferromagnets, Ising ferromagnets, and the Ising nematic transition. Mean-field
theory close to the quantum critical point predicts a superconducting gap with
spin-triplet symmetry for the ferromagnetic systems and a singlet gap for the
nematic scenario. Studying fluctuations in this ordered phase using a nonlinear
sigma model, we find that these fluctuations are not suppressed by any small
parameter. As a result, we find that a superconducting quasi-long-range order
is still possible in the Ising-like models but long-range order is destroyed in
Heisenberg ferromagnets.
