Title :
Advanced vertical MR head
Author :
Shibata, Takuji ; Takada, Akio ; Narisawa, Hiroaki ; Fukuyama, Munekatsu ; Soda, Yutaka
Author_Institution :
Magmetic Devices Div., Sony Corp., Tagajo, Japan
fDate :
9/1/1996 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
