Hysteresis of Finite Arrays of Magnetic nano Dots

M. Amin Kayali; Wayne M. Saslow

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arXiv · cond-mat/0310481

Hysteresis of Finite Arrays of Magnetic nano Dots

M. Amin Kayali·Wayne M. Saslow

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Abstract

Hysteresis curves for finite arrays of $N\times N$ ferromagnetic nano dots subject to the dipole-dipole interaction are investigated for $N=2... 13$. Spin arrangements up to N=6 are presented, which indicate the onset of bulk-like behavior associated with odd (N=5) and even (N=6) systems. The effect of field misalignment on the hysteresis loops is also studied for $N=3... 6$. The area $A_N$ of the hysteresis loop is studied as a function of $N$. We find that $A_N-A_\infty$ approximately scales as $N^{-{3/2}}$ for $N$ odd and as $N^{-2}$ for $N$ even.

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M. Amin Kayali, Wayne M. Saslow. 2003-10-21. Hysteresis of Finite Arrays of Magnetic nano Dots. https://arxiv.org/abs/cond-mat/0310481

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