Domain Structures in Iron Whiskers as Observed by the Kerr Method

摘要

An improved magneto-optic Kerr instrument was used for observation of magnetic domains in iron whiskers undergoing a magnetization cycle with applied peak fields of 6000 oe, parallel to the axis of the whisker. It was found that a domain structure persisted near the tip of the whiskers even under the maximum applied field. The domain configuration at fields above 2000 oe is simple, consisting of domains magnetized perpendicular to the axis of the whisker and in the same sense around all of its lateral faces. The width of these domains decreases as the field is increased.