Patent ID: 7057853
Filing Date: 2006-06-06
Classification: G11B

Abstract:
1. A magnetic head, comprising: a thin-film magnetic head for perpendicular magnetic recording, said thin-film magnetic head including a main pole with its tip facing a magnetic recording medium and coils for exciting said main pole, wherein the tip of or at least a part of said main pole includes a soft magnetic multilayer containing laminations, each of which comprises a first ferromagnetic film, a second ferromagnetic film, and an antiparallel coupling layer formed between said first ferromagnetic film and said second ferromagnetic film, wherein said antiparallel coupling layer causes antiferromagnetic interlayer coupling of said first ferromagnetic film and said second ferromagnetic film, and further wherein a saturated magnetic field of said soft magnetic multilayer containing laminations falls within a range from 20 Oe to 400 Oe, a thickness of each said ferromagnetic film falls within a range from 5 nm to 50 nm, a total thickness of said laminations is less than 2 μm, and the number of layers of said ferromagnetic film of said main pole is from 4 to 12.