Nano Archive

Investigation of the magnetization reversal of a magnetic dot array of Co/Pt multilayers

Krone, P. and Makarov, D. and Cattoni, A. and Faini, G. and Haghiri-Gosnet, A.-M. and Knittel, I. and Hartmann, U. and Schrefl, T. and Albrecht, M. (2011) Investigation of the magnetization reversal of a magnetic dot array of Co/Pt multilayers. Journal of Nanoparticle Research, 13 (11). pp. 5587-5593.

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Abstract

The magnetization reversal behavior of a dot array consisting of Co/Pt multilayers with perpendicular magnetic anisotropy was investigated. The size of the dots was varied from 200 nm down to 40 nm, while keeping the filling factor constant at about 0.16. The structural properties were determined by scanning electron microscopy, whereas the magnetic investigation was performed using SQUID and MFM techniques. It was observed that the dot size has a severe impact on the magnetization reversal mechanism where only the smallest dots with a size of 40 nm are found to be in a magnetic single-domain state. Moreover, the patterning process leads to a degradation of the multilayer, leading to a reduction of the switching field and an increase of the switching field distribution with decreasing dot size. In addition, micromagnetic simulations were performed to understand the magnetization reversal mechanism in more detail.

Item Type:Article
Subjects:Engineering > Nanotechnology applications in ICT
ID Code:11566
Deposited By:Prof. Alexey Ivanov
Deposited On:05 Jan 2012 09:34
Last Modified:05 Jan 2012 09:42

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