Nonlinear coupling of electromagnetic and spin-electron-acoustic waves in spin-polarized degenerate relativistic astrophysical plasma

Propagation of the finite amplitude electromagnetic wave through partially spin-polarized degenerate plasmas leads to an instability. This instability happens due interaction with small-frequency longitudinal spin-electron-acoustic waves. The strongest growth in high-density Fermi momentum close mec, where me is mass electron and c speed light. increase increment spin polarization found.