Abstract
The topography of a ferrite-garnet surface irradiated with swift-energy Ar+ ions is studied. It is shown that the ion-beam incidence angle is the main parameter determining the features of the pattern. It is revealed that a ripple structure with crests perpendicular to the beam projection turns into a structure with crests oriented along the beam projection with increasing incidence angle. The angle at which the pattern appears and the angle of the transition from one form of the pattern to the other differ from that calculated by the Bradley-Harper theory. The transition of the ripple structure with crests along the beam projection to that oriented perpendicular to the beam direction is observed upon irradiation near the critical angle with increasing irradiation dose.
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