P.L. Kapitza Institute for Physical Problems, Kosygina 2, Moscow 117334, Russia
Abstract:
The boundary condition for the magnetization jump at an interface of two Fermi liquids and the spin current through the interface is rederived. With the use of the derived condition the coefficient of reflection of a spin wave from a boundary of two Fermi liquids for normal incidence is found and applied to the case of interface of phase separated liquid mixture of 3He in 4He. The effect of the phase separation boundary on the coherently precessing spin pattern is discussed.