Advanced vertical MR head

Author

Shibata, Takuji ; Takada, Akio ; Narisawa, Hiroaki ; Fukuyama, Munekatsu ; Soda, Yutaka

Author_Institution

Magmetic Devices Div., Sony Corp., Tagajo, Japan

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3413

Lastpage

3415

Abstract

A newly designed vertical magnetoresistive (MR)/inductive head has been developed. In this new head, the read element has the tri-layer structure, in which the insulator layer is sandwiched between the two permalloy layers, and both ends of the elements are filled with the insulator. The sense current lead is connected only to the upper NiFe layer. As a result, not only the sense current density is enlarged but also the film Hk is reduced. The sensor sensitivity is estimated to be 2.5 times as large as that of the conventional vertical MR sensor. The output level of about 700 μVpp is obtained at the read track width of 1.5 μm. The D₅₀ is at about 5.8 kfc/mm

Keywords

Permalloy; magnetic heads; magnetoresistive devices; 1.5 micron; NiFe; anisotropy field; insulator layer; permalloy layer; read element; recording density; sense current density; sensor sensitivity; track width; tri-layer sandwich structure; vertical magnetoresistive/inductive head; Conductivity; Current density; Electrostatic discharge; Insulation life; Magnetic heads; Magnetic materials; Magnetic sensors; Magnetoresistance; Noise reduction; Sensor phenomena and characterization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538641

Filename

538641