Quantitative evaluation of magnetic flux density in a magnetic recording head and pseudo soft underlayer by electron holography

被引：3
|
作者：
Xia, Weixing [1 ,5 ,6 ]
Hirata, Kei [2 ,3 ]
Yanagisawa, Keiichi [2 ,5 ,6 ]
Ishida, Yoichi [3 ]
Kasai, Hiroto [2 ,4 ,6 ]
Yanagiuchi, Katsuaki [3 ]
Shindo, Daisuke [1 ,2 ]
Tonomura, Akira [2 ,4 ,5 ,6 ]
机构：
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
[2] Okinawa Inst Sci & Technol, Okinawa 9040411, Japan
[3] TDK Corp, Head Business Grp, Nagano 3858555, Japan
[4] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan
[5] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan
[6] Funding Program World Leading Innovat Res & Dev S, Hatoyama, Saitama 3500395, Japan
来源：
JOURNAL OF ELECTRON MICROSCOPY | 2010年 / 59卷 / 05期
关键词：
electron holography; magnetic head; soft underlayer; finite element method;
D O I：
10.1093/jmicro/dfq057
中图分类号：
TH742 [显微镜];
学科分类号：
摘要：
The magnetic interaction between the pole tip of a single-pole head and a pseudo soft underlayer in perpendicular magnetic recording was observed by electron holography. The magnetic flux density inside the soft underlayer was quantitatively evaluated. The distribution of magnetic flux density was calculated using the finite element method, and the influences of the modulation of the reference wave and stray fields were investigated by comparison with experimental results. The flux density observed was found to be underestimated due to the modulation of the phase shift in reference wave. The magnetic flux measured experimentally was larger than that inside the specimen because of the relatively large stray fields above and below the specimen in the direction of the electron beam.
引用
收藏
页码：331 / 337
页数：7
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