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This paper provides a systematic micromagnetic analysis on the magnetization processes in various miniaturized single-turn head designs. The calculation results show that a thick yoke yields the formation of a magnetization vortex through the yoke thickness, resulting in efficient flux conduction at small yoke dimensions. A vortex structure is also important for the pole tips to maintain zero remanence after writing. Following this understanding, a hollow yoke structure has been studied to promote the efficient flux conduction in the yoke and flux closure mode in the pole tips at the remanent state. The simulation results are elucidating for efficient single-turn head designs at small yoke dimensions. Index Terms--Narrow tracks, single-turn write heads, thin film heads, write heads.

Presents a study of single-turn high-frequency write heads at submicron track widths utilizing a full three-dimensional dynamic micromagnetic model. Designs that are modeled to study the effect of head dimensions; Calculated head field inside the recording media for the head designs; Magnetization configurations of the laminated layers in the top yoke.