RANGE AND STOPPING POWER DEPENDENCE OF HEAVY-ION-INDUCED DEMAGNETIZATIONS OF FERROMAGNETIC MATERIALS

Heavy ion beams induce by their stopping power severe demagnetizations of ferromagnetic materials of dynamic nature, This perturbation of fe rromagnetism causes substantial attenuations of transient magnetic fie lds on traversing probe ions. A striking stopping power dependence has been found when the probe ions are in the H-like charge state. Due to the uncorrelated behaviour of beam ions and probe ions, moving on dif ferent trajectories through the ferromagnetic sample, the demagnetizat ion, initially located at the ionization track of the beam ion, must p ropagate to the region of the probe ion. The determination of the rang e of demagnetization from its origin was the subject of the present me asurements.