High-frequency properties of stray fields emanating from hard disk writer poles up to 2 GHz

Michael Rudolf Koblischka, J. D. Wei, U. Hartmann

研究成果: Article

10 引用 (Scopus)

抄録

Using high-frequency magnetic force microscopy (HF-MFM), we investigate the stray fields emanating from hard disk writer poles. An amplitude-modulated high-frequency current is sent to the writer coil, and the resulting stray fields are imaged by HF-MFM, employing carrier frequencies up to 2 GHz. This advance is possible due to ferrite-coated MFM cantilevers. We observe that, as a function of frequency, the emanating field is forming two peaks around the gap area, and the maximum field is shifting from the centre position in the gap towards one side of the writer pole.

元の言語English
ページ(範囲)1694-1696
ページ数3
ジャーナルJournal of Magnetism and Magnetic Materials
322
発行部数9-12
DOI
出版物ステータスPublished - 2010 5 1
外部発表Yes

Fingerprint

Magnetic force microscopy
magnetic force microscopy
Hard disk storage
Poles
poles
Ferrite
carrier frequencies
ferrites
coils

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

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abstract = "Using high-frequency magnetic force microscopy (HF-MFM), we investigate the stray fields emanating from hard disk writer poles. An amplitude-modulated high-frequency current is sent to the writer coil, and the resulting stray fields are imaged by HF-MFM, employing carrier frequencies up to 2 GHz. This advance is possible due to ferrite-coated MFM cantilevers. We observe that, as a function of frequency, the emanating field is forming two peaks around the gap area, and the maximum field is shifting from the centre position in the gap towards one side of the writer pole.",
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AB - Using high-frequency magnetic force microscopy (HF-MFM), we investigate the stray fields emanating from hard disk writer poles. An amplitude-modulated high-frequency current is sent to the writer coil, and the resulting stray fields are imaged by HF-MFM, employing carrier frequencies up to 2 GHz. This advance is possible due to ferrite-coated MFM cantilevers. We observe that, as a function of frequency, the emanating field is forming two peaks around the gap area, and the maximum field is shifting from the centre position in the gap towards one side of the writer pole.

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KW - HF-MFM

KW - High-frequency behaviour

KW - Stray field

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