Study of Magnetic Dynamic Properties for Magnetic Cluster and Quantum Dots with Hexagonal Array

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Abstract:

Based on the Monte-Carlo simulation, magnetic dynamic properties of magnetic clusters and quasi two-dimensional quantum dots with hexagonal lattice arrays have been calculated. It has been found that the saturation fields for the cluster and quantum dot increase with increasing dipolar interaction. However, hysteresis loops of the quantum dots are different from those in clusters. Hysteresis behavior of quantum dot array is associated closely with the radius of quantum dot and the distance between quantum dots. The calculated results are consistent with experimental results. Finally, the step effect of hysteresis loops has been explained by the competition roles among the configurational anisotropy energy, Zeeman energy and thermal energy.

Keywords: CLUSTER; MAGNETIC PROPERTIES; MONTE-CARLO SIMULATION; QUANTUM DOT ARRAYS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.C220

Publication date: February 1, 2009

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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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