A general theory of linearized spin echoes in an interacting Fermi liquid is developed by expressing the results of the usual type of echo experiment directly in terms of the spin-wave normal modes of the liquid as derived from the Landau theory. The possibility of obtaining further information by observing the echoes produced by a spatially nonuniform magnetization is briefly discussed.

• Received 31 July 1968

DOI:https://doi.org/10.1103/PhysRev.177.336