Evaluation of front flux guide-type magnetic tunnel junction heads

被引：19

作者：

Shimazawa, K ^{[1
]}

Redon, O

Kasahara, N

Sun, JJ

Sato, K

Kagami, T

Saruki, S

Umehara, T

Fujita, Y

Yarimizu, S

Araki, S

Morita, H

Matsuzaki, M

机构：

[1] TDK Corp, R&D Dept, DASCOM, Nagano 3850009, Japan

[2] TDK Corp, Head Div 1, DASCOM, Nagano 3850009, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2000年 / 36卷 / 05期

关键词：

magnetic recording/magnetic tunnel junction; heads; front flux guide; shot noise; micromagnetic simulation;

D O I：

10.1109/20.908501

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：

Magnetic tunnel junction (MTJ) heads have been successfully fabricated using the free layer as flux guide to prevent electrical short during the definition of the air bearing surface (ABS). For a 6 Gbits/in(2) design, an output as high as 5740 mu Vpp was achieved for 3 mA sense current, and the output waveform was stable and noise free, Noise analysis confirmed that shot noise is prevailing in these MTJ heads, suggesting that the junction resistance has to be further reduced to challenge spin-valve heads in term of signal to noise ratio. Landau-Lifshitz-Gilbert simulations showed that for 20 Gbits/in(2) application, the flux guide height should not exceed 0.1 mum.

引用

页码：2542 / 2544

页数：3

共 9 条

[1] The electrical and magnetic response of yoke-type read heads based on a magnetic tunnel junction [J].