NMR AND MAGNETIC SUPERCURRENT IN HE-3-B

Magnetic or spin supercurrent is a current of one of the magnetization components caused by the gradient of the order parameter phase alpha. If magnetic resonance is excited in a magnetic ordered material the precession angle alpha = phi-t and the deflection angle beta can be considered as the order parameter phases. In our experiments magnetic supercurrent is observed in superfluid He-3-B, which is a superfluid antiferromagnet. Three types of NMR experiments are described in this paper. (1) The excitation of NMR with homogeneous precessing in an experimental cell located in an inhomogeneous static magnetic field (homogeneous precessing domain - HPD). (2) Observation of a supercurrent transporting the longitudinal magnetization from one experimental cell to another through a narrow channel if a phase difference delta-alpha is established between the two cells. (3) Obtaining a circular spin current, i.e., spin vortex, by creating a precessing domain in quadrupole RF field.