文档介绍：ARTICLE IN PRESS
Journal of ism and ic Materials 313 (2007) 300–305
ate/jmmm
Improved corrosion resistance of spin-valve film
H. TetsukawaÃ, H. Hommura, A. Okabe, Y. Soda
Sony Corporation, 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
Received 6 November 2006; received in revised form 22 January 2007
Available online 6 February 2007
Abstract
We investigated the corrosion behavior and oresistance of spin-valve film in order to improve the corrosion resistance of the
spin-valve head for a tape recording system. The conventional spin-valve head (sub./Ta/NiFe/CoFe/Cu/CoFe/PtMn/Ta) with no
diamond-like carbon (DLC) protective layer showed poor corrosion resistance. This is because the CoFe for ic layer and Cu
for spacer in the spin-valve film exhibited poor corrosion resistance. The corrosion resistance of the CoFe film and Cu film improved with
the addition of Ni and Au, respectively. The spin-valve film (sub./Ta/NiFe/CoNiFe/CuAu/CoNiFe/PtMn/Ta) showed higher pitting
potential than the conventional spin-valve film by + V. This presents a significant improvement over the conventional spin-valve
film. We also investigated the effect of position of ic layer and spacer on the oresistance of the spin-valve film.
The oresistance of the spin-valve film by substitution of CoNiFe for CoFe in ic layer decreased slightly. The
oresistance of the spin-valve film dec