Applying amorphous CoNbZr shield to improve the dielectric-breakdown voltage of the gap layers of narrow-gap read heads

We investigated the dependence of the dielectric-breakdown voltage of the gap layer on lower shield material. The dielectric breakdown voltage of the gap layer is higher for the test elements with the CoNbZr shield than that with the NiFe shield, especially in the thin-gap range. The dielectric-brea...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2003-09, Vol.39 (5), p.2393-2395
Main Authors: Hoshino, K., Odai, S., Hatatani, M.
Format: Article
Language:English
Subjects:
Amorphous materials
Applied sciences
Dielectric breakdown
Dielectrics and electrical insulation
Electrodes
Electronics
Exact sciences and technology
Giant magnetoresistance
Magnetic devices
Magnetic heads
Magnetic sensors
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.)
domain-motion devices, etc
Magnetism
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Sputtering
Testing
Voltage
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigated the dependence of the dielectric-breakdown voltage of the gap layer on lower shield material. The dielectric breakdown voltage of the gap layer is higher for the test elements with the CoNbZr shield than that with the NiFe shield, especially in the thin-gap range. The dielectric-breakdown voltage is about twice as high with the CoNbZr shield as with the NiFe shield for a 20-nm-thick gap layer. We also investigated the dielectric breakdown of the gap layer and the head performance using the CoNbZr-NiFe hybrid lower shield. The hybrid-shield head showed higher dielectric breakdown than that of the conventional NiFe shield. In terms of read performance, there is no difference between hybrid and conventional shield heads. The shield-to-shield spacing can decrease to 65 nm by using a hybrid shield. The hybrid shield is much more efficient in narrow-gap read heads than conventional shields.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.815460