Abstract—Analytical expressions for the scalar magnetic potential vs. variation of magnetization
in the pole of a thin-film magnetic head, pole dimensions, and the horizontal and vertical
pole positions relative to the plane of the hard-disk working layer were established. Expressions
for the magnetic stray fields vs. the horizontal and vertical poles were obtained by studying the
pole domain structure vs. the external magnetic field and determining the domain of magnetization
variation in the pole marginal zones vs. the external field. Expressions for the write fields
of the thin-film heads were established as a superposition of the pole stray fields. Examples of
calculations of the write fields were given for various kinds of the thin-film magnetic heads.