A perpendicular contact recording head with high moment laminated FeAlN/NiFe pole tips

Author

Wang, S. ; Louis, E. ; Wolfson, J. ; Anderson, R. ; Kryder, M.H.

Author_Institution

Dept. of Electr. Eng., Stanford Univ., CA, USA

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

3897

Lastpage

3899

Abstract

Perpendicular recording probe heads using high moment FeAlN/NiFe laminated magnetic materials as poles mere fabricated and tested. FeAlN/NiFe films with a saturation magnetization of 18 kG, a coercivity of 1.0 Oe, and an anisotropy field of 8 Oe, were developed for application in Micro Flexhead components. When tested on CoCrTa/NiFe double layer disks, the high moment heads showed superior overwrite performance and nearly equivalent isolated pulse width compared with typical CoZrNb heads. Vertical domain walls perpendicular to the as-deposited easy-axis of the poles were observed with a scanning magneto-optic photometer and correlated to the read amplitude variations

Keywords

coercive force; ferromagnetic materials; iron alloys; laminates; magnetic domains; magnetic heads; nickel alloys; perpendicular magnetic anisotropy; perpendicular magnetic recording; 18 kG; FeAlN-NiFe; Micro Flexhead components; anisotropy field; as-deposited easy-axis; coercivity; high moment heads; isolated pulse width; laminated FeAlN/NiFe pole tips; laminated magnetic materials; overwrite performance; perpendicular contact recording head; perpendicular recording probe heads; read amplitude variations; saturation magnetization; scanning magneto-optic photometer; vertical domain walls; Anisotropic magnetoresistance; Coercive force; Magnetic films; Magnetic heads; Magnetic materials; Materials testing; Perpendicular magnetic recording; Probes; Saturation magnetization; Space vector pulse width modulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.333937

Filename

333937