Magnetic recording apparatus with correlated main magnetic pole-to-shields spacing and main magnetic pole-to-medium layers spacing

摘要

Embodiments of the present invention achieve a high linear recording density and a high track recording density to thereby improve the areal recording density in a perpendicular magnetic recording apparatus having a magnetic head that includes a trailing shield and side shields around a main magnetic pole piece. According to one embodiment, in a magnetic recording apparatus, each of magnetic distances of various sorts is set so as to satisfy relationships of LmagT-Gap and HUSS-Gap, where the magnetic shortest distance between the main magnetic pole piece and a trailing shield is defined as T-Gap; the magnetic shortest distance between the main magnetic pole piece and each of side shields disposed on both sides of the main magnetic pole piece is defined as S-Gap; a distance between a surface of the main magnetic pole piece and a lower surface of a magnetic recording layer constituting a recording medium is defined as Lmag; and a distance between the surface of the main magnetic pole piece and an upper surface of a soft magnetic underlayer of the recording medium is defined as HUS. Further, each of the magnetic distances of various sorts is set so as to satisfy a relationship of LmagT-GapHUSS-Gap.