Remanence and Switching Sensitivity in Nanodot Magnetic Arrays

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Abstract:

New results are reported of the computer simulations on the magnetic behaviour of magnetic arrays of nanoscopic dots, placed in cells of the square lattice. We show that the remanence magnetization Mr decreases with the array size. For arrays 50 × 50, we investigate also the stability of the magnetic structure of an array in an oscillating magnetic field. The damage spreading technique reveals that this stability increases with the standard deviation of the switching field of individual elements of the array. On the other hand, Mr decreases with . An optimalization of the system (large Mr and large stability) can then be reached at some intermediate value of .

Keywords: COMPUTER SIMULATION; HYSTERESIS; MAGNETIC DOT; MAGNETOSTATIC INTERACTION; SWITCHING FIELD DISTRIBUTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2008.002

Publication date: June 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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