High susceptibility domain configuration in micron-sized ferromagnetic stripes

The authors report on a newly discovered domain configuration, observed with a magnetooptical microscope, in narrow stripes of NiCoFe, CoFeCu and NiFe. The stripes-1 to 25 mu m wide and 0.5 to 2.0 mu m thick-are used as a model for a narrow-track pole of a recording head. The new domain configuration, with its magnetization oriented mostly in a plane perpendicular to the long dimension of the stripe, suggests the possibility of obtaining a large high-frequency susceptibility even in recording head poles as a narrow as 1 mu m.<
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