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Title: Individual bit island reversal and switching field distribution in perpendicular magnetic bit patterned media
Authors: Chen, Y.J.
Huang, T.L.
Shi, J.Z.
Deng, J.
Ding, J. 
Li, W.M. 
Leong, S.H.
Zong, B.Y.
Ko, H.Y.Y.
Hu, S.B.
Zhao, J.M.
Keywords: Bit patterned media
Magnetic force microscopy
Magnetic recording
Switching field distribution
Issue Date: Feb-2012
Citation: Chen, Y.J., Huang, T.L., Shi, J.Z., Deng, J., Ding, J., Li, W.M., Leong, S.H., Zong, B.Y., Ko, H.Y.Y., Hu, S.B., Zhao, J.M. (2012-02). Individual bit island reversal and switching field distribution in perpendicular magnetic bit patterned media. Journal of Magnetism and Magnetic Materials 324 (3) : 264-268. ScholarBank@NUS Repository.
Abstract: The switching of single bit magnetic islands in bit patterned media (BPM) for two cases with 10 times difference in coercivity, as well as the switching field distribution (SFD) of the islands, has been studied using magnetic force microscopy (MFM) measurements. The intrinsic SFD is measured to be ∼911% of the remanence coercivity (Hcr), which contributes only ∼2050% of the total SFD broadening (∼2341% of Hcr). High resolution MFM observations clearly showed the influence of surrounding islands on the switching behaviour and switching fields of individual bit islands, resulting in significant contributions in SFD broadening due to non-intrinsic dipolar interactions. It was further observed that single magnetic islands could be switched within a very narrow switching field range as small as 4 Oe, which indicates very sharp and uniform switching for each individual island of BPM. © 2010 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
ISSN: 03048853
DOI: 10.1016/j.jmmm.2010.11.094
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