Ferromagnetic resonance investigation of macroscopic arrays of magnetic nanoelements fabricated using polysterene nanosphere lithographic mask technique

Kostylev, M., Magaraggia, R., Ogrin, F.Y., Sirotkin, E., Mescheryakov, V.F., Ross, N. and Stamps, R.L. (2008) Ferromagnetic resonance investigation of macroscopic arrays of magnetic nanoelements fabricated using polysterene nanosphere lithographic mask technique. IEEE Transactions on Magnetics, 44(11), pp. 2741-2744. (doi: 10.1109/TMAG.2008.2002475)

Abstract

A dense plane periodical array of cylindrical magnetic nanodots has been fabricated using a lithographic mask formed by self-organization of polystyrene nanospheres. In this paper, we study collective static and dynamic magnetic behavior of this array. We find that this technique produces samples with reasonably small dispersion of magnetic parameters of individual dots. This is evidenced by magnetometry and well-resolved discrete frequencies of standing spin waves measured with cavity and coplanar-waveguide ferromagnetic resonance. The standing spin wave resonances could be reliably observed in a large range of frequencies (4-15 GHz). However the measured linewidth of resonances is about ten times larger than for unpatterned Permalloy. This may be due to some variation in shape and magnetic parameters from dot to dot resulting in inhomogeneous broadening of the resonance lines.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Stamps, Professor Robert
• Authors: Kostylev, M., Magaraggia, R., Ogrin, F.Y., Sirotkin, E., Mescheryakov, V.F., Ross, N., and Stamps, R.L.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: IEEE Transactions on Magnetics
• ISSN: 0018-9464