  Higgs mode in superconducting materials describes slowly-decaying
oscillations of the order parameter amplitude. We demonstrate that in magnetic
superconductors with built-in spin-splitting field Higgs mode is strongly
coupled to the spin degrees of freedom allowing for the generation of
time-dependent spin currents.
  Converting such spin currents to electric signals by spin-filtering elements
provides a tool for the second-harmonic generation and the electrical detection
of the Higgs mode generated by the external irradiation. The non-adiabatic spin
torques generated by these spin currents allow for the magnetic detection of
the Higgs mode by measuring the precession of magnetic moment in the adjacent
ferromagnet. We discuss also the reciprocal effect which is the generation of
the Higgs mode by the magnetic precession. Coupling the collective modes in
superconductors to light and magnetic dynamics opens the new direction of
superconducting optospintronics.
