ZERO-TEMPERATURE RELAXATION IN SPIN-POLARIZED FERMI SYSTEMS

The effect of zero-temperature attenuation, which has been recently ob served in spin dynamics of Fermi liquids, on various processes in heli um and ferromagnetic systems is described. A brief review of theoretic al and experimental data on zero-temperature attenuation in transverse spin dynamics of helium systems is followed by a discussion of coupli ng between longitudinal and transverse processes, the Castaing instabi lity in He-3 and He-3-He-4 mixtures, and applications to pure ferromag netic metals. (C) 1997 American Institute of Physics.