Interaction of Spin Waves with Drifted Carriers in Solids

Abstract

Interaction of θ=0° spin waves with drifted helicons is analyzed, and a convective instability is predicted. The mechanism for amplification is due to the second-order rf electron field in the drift direction. This Lorentz field, Ez=ṽtrans×B̃trans=ṽtrans×μeffH̃trans is large because μeff is large in the region of synchronism between the spin wave and the electrokinetic wave.