Phase transitions to spin‐triplet ferromagnetic superconductivity in neutron stars

Effects of the anisotropy of Cooper pairs in spin‐triplet ferromagnetic superconductors are investigated on the basis of the Ginzburg‐Landau theory. A special attention is paid to the triggering of the superconducting state by the ferromagnetic order. The ground states of these superconductors are outlined and discussed. The idea about a possible coexistence of ferromagnetism and spin‐triplet superconductivity in neutron stars is introduced.