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Vortex core size in interacting cylindrical nanodot arrays

D Altbir1, J Escrig1, P Landeros2, F S Amaral3 and M Bahiana3

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The effect of dipolar interactions among cylindrical nanodots, with a vortex–core magnetic configuration, is analyzed by means of analytical calculations. The cylinders are placed in a N × N square array in two configurations—cores oriented parallel to each other and with antiparallel alignment between nearest neighbors. Results comprise the variation in the core radius with the number of interacting dots, the distance between them and dot height. The dipolar interdot coupling leads to a decrease (increase) of the core radius for parallel (antiparallel) arrays.


PACS

61.46.-w Structure of nanoscale materials

75.75.+a Magnetic properties of nanostructures

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

75.30.Cr Saturation moments and magnetic susceptibilities

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 48 (5 December 2007)

Received 25 June 2007

Published 30 October 2007



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