THE MAGNETIC SIGNALS ACCOMPANYING THE MOVING A-B INTERFACE OF SUPERFLUID HE-3

The magnetic signals emitted by a moving A-B interface are calculated using the spin hydrodynamic theory and the general boundary conditions at the A-B interface. Most experimental observations1 are well accoun ted for. We especially find the following behavior for the excess magn etization: (i) It vanishes if the interface velocity u is below a thre shold,- (ii) it starts growing with u2 above the threshold, spreads co nsiderably in the A phase, and develops a leading edge; (iii) it diver ges as u approaches the spin wave velocity.