High frequency magnetic field imaging by frequency modulated magnetic force microscopy

被引：4
|
作者：
Saito, Hitoshi [1 ]
Lu, Wei [1 ]
Hatakeyama, Kodai [1 ]
Egawa, Genta [1 ]
Yoshimura, Satoru [1 ]
机构：
[1] Akita Univ, Ctr Geoenvironm Sci, Fac Engn & Resource Sci, Akita 0108502, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 09期
关键词：
RECORDING MEDIA; RESOLUTION;
D O I：
10.1063/1.3368706
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
High frequency ac magnetic field from magnetic recording head was successfully imaged by using our newly developed frequency-modulated magnetic force microscopy (FM-MFM), which uses the frequency modulation of cantilever oscillation caused by applying ac magnetic field to a mechanically oscillated cantilever. The FM-MFM has been demonstrated and the experimental results show good agreement with our proposed models for FM-MFM. The amplitude and phase images of an ac magnetic field can be obtained separately by using the FM-MFM technique with a lock-in amplifier. By taking advantage of this technique, the present FM-MFM method opens a possibility to evaluate the magnetic field characteristics of magnetic recording head with high spatial resolution. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3368706]
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页数：3
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