Magnetic heads for perpendicular recording and magnetic recording disk apparatus using the same

摘要

A magnetic head includes a main pole having a first portion with a length (W 1 ) in a cross-track direction which continuously increases from a leading edge side to a trailing edge side, a second portion formed on a trailing edge side of the first portion, and a third portion formed on a trailing edge side of the second portion. A length (W 2 ) in the cross-track direction of a boundary line between the second portion and the third portion is longer than W 1 , and a length (W 3 ) in the cross-track direction of a trailing edge of a third portion is substantially equal to W 2.