| 摘要 |
A perpendicular magnetic head suppresses pole erasing due to a remanent magnetization component of a main pole and is capable of higher density recording. The perpendicular magnetic head is equipped with a main pole that produces magnetic flux toward a medium surface of a recording medium. The main pole is formed by laminating a top thin magnetic layer and a bottom thin magnetic layer in the thickness direction. The top thin magnetic film is formed as a high Bs thin magnetic film with a first saturation flux density and the bottom thin magnetic film is formed as a low Bs thin magnetic film with a second saturation flux density that is lower than the first saturation flux density, and the high Bs thin magnetic film and the low Bs thin magnetic film satisfy the following equation <?in-line-formulae description="In-line Formulae" end="lead"?>(volume of the high Bs thin magnetic film)x(first saturation flux density) <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?><(volume of the low Bs thin magnetic film)x(second saturation flux density).<?in-line-formulae description="In-line Formulae" end="tail"?>
|
