Low inductance and high efficiency single-pole writing head for perpendicular double layer recording media

被引：41

作者：

Muraoka, H ^{[1
]}

Sato, K ^{[1
]}

Sugita, Y ^{[1
]}

Nakamura, Y ^{[1
]}

机构：

[1] Tohoku Univ, RIEC, Sendai, Miyagi 9808577, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 02期

关键词：

inductive head; perpendicular magnetic recording; single-pole head; double layer media;

D O I：

10.1109/20.750621

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A new type of thin film inductive single-pole head for perpendicular magnetic recording has been developed to provide a writing head for perpendicular double layer media. The head consisted of a main pole, three thin-film conductive layers to drive the pole and a return path pole. A low inductance of around 1.5 nH and a small saturation magneto-motive force of less than 0.025 AT(0.p) was obtained. The D-50 was 180 kFRPI with an MR head of 210 nm shield separation. The error rate at 310 kFRPI was 10(-6). Head induced erasure, which is an issue for the single-pole head, was also investigated by experiments and calculations. Around 10 % output reduction in 20 Oe stray field was confirmed. Computer simulation predicted an improvement by reducing the permeability of the medium's underlayer.

引用

页码：643 / 648

页数：6

共 15 条

[1] Triple-layer perpendicular recording media for high SN ratio and signal stability [J].