CPP-GMR with oxidized Co-Fe layer on various lower-electrode materials

Author

Hoshino, K. ; Hoshiya, H. ; Katada, H. ; Yoshida, N. ; Watanabe, K. ; Nakamoto, K.

Author_Institution

Storage Technol. Res. Center, Hitachi Ltd., Kanagawa, Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

1219

Lastpage

1220

Abstract

Current screen CPP-GMR was investigated using various lower-electrode materials to vary its´ crystalline structure with the aim of individually controlling the resistance and MR ratio. Furthermore, these CPP-GMR films were applied to read heads and the read-head performance for perpendicular recording was evaluated. The read heads showed a high output of 2.1 mV_p-p and high SNR of 30 dB, using CPP-GMR with 3% MR ratio and 0.6 Ωμm² RA. A current screen CPP-GMR film with an MR ratio of over 6% at 0.3 Ωμm² RA was obtained.

Keywords

cobalt alloys; crystal structure; electrodes; giant magnetoresistance; iron alloys; magnetic heads; magnetic thin films; oxidation; perpendicular magnetic recording; 2.1 mV; 30 dB; Cu-CoFeO-Cu-Au; MR ratio; NiFe-CoFeO-Cu-Au; Ru-CoFeO-Cu-Au; SNR; current screen CPP-GMR film; lower-electrode materials; oxidized Co-Fe layer; read heads; resistance; Crystalline materials; Crystallization; Disk recording; Gold; Hard disks; Magnetic heads; Magnetic materials; Material storage; Perpendicular magnetic recording; Sputtering;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464039

Filename

1464039