| 摘要 |
In one embodiment, a perpendicular magnetic head includes a main magnetic pole, a trailing shield, and a multilayered side/leading shield disposed on a leading side of the main magnetic pole in a down-track direction and on either side of the main magnetic pole in a cross-track direction. The side/leading shield includes an inner layer nearer to the main magnetic pole which surrounds the main magnetic pole on three sides and an outer layer farther from the main magnetic pole than the inner layer which surrounds the main magnetic pole and inner layer on three sides. The inner layer has a saturation magnetization (Ms) that is greater than a Ms of the outer layer, and the trailing shield has a relative permeability of greater than about 50. Other magnetic heads and methods of producing magnetic heads are also presented according to various embodiments. |
