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We show that a primeval seed magnetic field arises due to spin-degeneracybreaking of fermions caused by the dragging of inertial frames in the curvedspacetime of rotating astrophysical bodies. This seed magnetic field wouldarise even due to electrically neutral fermions such as neutrons. As anexample, we show that an ideal neutron star rotating at $500$ revolutions persecond, having mass $0.83$ M$_{\odot}$ and described by an ensemble ofdegenerate neutrons, would have $0.12$ Gauss seed magnetic field at its centerarising through the breaking of spin-degeneracy.

Origin of primeval seed magnetism in rotating astrophysical bodies