  We develop a theoretical description of electro-magnon solitons in a coupled
ferroelectric-ferromagnetic heterostructure. The solitons are considered in the
weakly nonlinear limit as a modulation of plane waves corresponding to two,
electric- and magnetic-like branches in the spectrum. Emphasis is put on
magnetic-like envelope solitons that can be created by an alternating electric
field. It is shown also that the magnetic pulses can be amplified by an
electric field with a frequency close to the band edge of the magnetic branch.
