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Iron–platinum-coated carbon nanocone probes on tipless cantilevers for high resolution magnetic force imaging

I-Chen Chen1, Li-Han Chen1,3, Andrew Gapin1, Sungho Jin1, Lu Yuan2 and Sy-Hwang Liou2

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High coercivity iron–platinum-coated carbon nanocones (CNCs) have been fabricated for magnetic force microscopy (MFM) by direct-current plasma-enhanced chemical vapor deposition growth of nanocones on tipless cantilevers followed by sputtering and annealing of the FePt film. The FePt-coated CNC probe has many localized magnetic stray fields due to the high-aspect-ratio geometry and small radius of the tip. The MFM imaging on magnetic recording media was performed using CNC probes and compared with the imaging by FePt-coated silicon probes. An image with 20 nm lateral resolution has been demonstrated.


PACS

81.07.-b Nanoscale materials and structures: fabrication and characterization

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

81.16.Be Chemical synthesis methods

75.75.+a Magnetic properties of nanostructures

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 7 (20 February 2008)

Received 19 June 2007, in final form 4 December 2007

Published 29 January 2008



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