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Demonstration of ultra-high-resolution MFM images using Co90Fe10-coated CNT probes

Authors
Choi, Sang-JunKim, Ki-HongCho, Young-JinLee, Hu-sanCho, Soo-haengKwon, Soon-JuMoon, Jung-hwanLee, Kyung-Jin
Issue Date
2월-2010
Publisher
ELSEVIER SCIENCE BV
Keywords
CNT probe; MFM; Magnetization value; Co90Fe10; FCI
Citation
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.322, no.3, pp.332 - 336
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume
322
Number
3
Start Page
332
End Page
336
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/117072
DOI
10.1016/j.jmmm.2009.09.052
ISSN
0304-8853
Abstract
We demonstrate ultra-high-resolution magnetic force microscopy images of perpendicular magnetic storage media using carbon nanotube probes coated by ferromagnetic Co90Fe10 films (20, 30, 40, and 50 nm). By optimizing ferromagnetic film thickness (effective tip diameter), we obtained best magnetic domain image with an 40 nm-Co90Fe10-coated tip (50nm tip diameter) about a lateral detect density of 1200 k flux per inch on perpendicular magnetic storage medium, one of the highest resolutions in MFM imaging reported for this material system and structure. The observed dependence of tip dimension on signal contrast and image resolution was successfully explained by a theoretical analysis indicating that the signal contrast, along with the physical probe-tipdimension, should be taken into account to design magnetic probes tips for high-resolution magnetic force microscopy. (C) 2009 Elsevier B.V. All rights reserved.
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