Nanoscale Magnetic Domains in Mesoscopic Magnets
- 21 June 1996
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 272 (5269) , 1782-1785
- https://doi.org/10.1126/science.272.5269.1782
Abstract
The basic magnetic properties of three-dimensional nanostructured materials can be drastically different from those of a continuous film. High-resolution magnetic force microscopy studies of magnetic submicrometer-sized cobalt dots with geometrical dimensions comparable to the width of magnetic domains reveal a variety of intricate domain patterns controlled by the details of the dot geometry. By changing the thickness of the dots, the width of the geometrically constrained magnetic domains can be tuned. Concentric rings and spirals with vortex configurations have been stabilized, with particular incidence in the magnetization reversal process as observed in the ensemble-averaged hysteresis loops.Keywords
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