Patent ID: 8537504
Filing Date: 2013-09-17
Classification: G01R,G11B,H01L

Abstract:
1. A read sensor comprising: a buffer layer formed of a ferromagnetic, amorphous film; a shielding layer formed of a ferromagnetic, polycrystalline film on the buffer layer; a seed layer formed of a ferromagnetic, polycrystalline film on the shielding layer; and a pinning layer formed of an antiferromagnetic, polycrystalline film on the seed layer wherein the buffer layer contains cobalt (Co) with a content ranging from 70 to 94 at % and X with a content ranging from 6 to 30 at %, where X is hafnium (Hf), zirconium (Zr), yttrium (Y) or boron (B), and has a thickness ranging from 0.6 to 4 nm.