Interacting circular nanomagnets

Details Interacting circular nanomagnets Interacting circular nanomagnets

2001-04-23

arxiv.org/abs/cond-mat/0104421v2

Physics

Condensed Matter

Materials Science

16 pages, 8 figures

Scientific paper

Regular 2D rectangular lattices of permalloy nanoparticles (40 nm in diameter) were prepared by the method of the electron lithography. The magnetization curves were studied by Hall magnetometry with the compensation technique for different external field orientations at 4.2K and 77K. The shape of hysteresis curves indicates that there is magnetostatic interaction between the particles. The main peculiarity is the existence of remanent magnetization perpendicular to easy plain. By numerical simulation it is shown, that the character of the magnetization reversal is a result of the interplay of the interparticle interaction and the magnetization distribution within the particles (vortex or uniform).

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