Ferromagnetism of nuclear matter in the relativistic approach Original Research Article

We study the spin-polarization mechanism in the highly dense nuclear matter with the relativistic mean-field approach. In the relativistic Hartree–Fock framework we find that there are two kinds of spin–spin interaction channels, which are the axial-vector and tensor exchange ones. If each interaction is strong and different sign, the system loses the spherical symmetry and holds the spin polarization in the high-density region. When the axial-vector interaction is negative enough, the system holds ferromagnetism.