Nanoscale Magnetic Domains in Mesoscopic Magnets

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 doma...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1996-06, Vol.272 (5269), p.1782-1785
Main Authors: Hehn, Michel, Ounadjela, Kamel, Bucher, Jean-Pierre, Rousseaux, Françoise, Decanini, Dominique, Bartenlian, Bernard, Chappert, Claude
Format: Article
Language:English
Subjects:
Applied sciences
Cobalt
Condensed Matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Demagnetization
Domain effects, magnetization curves, and hysteresis
Domain structure
Domain structure (Ferromagnetism)
Domain walls and domain structure
Electromagnetism
Exact sciences and technology
Geometric Concepts
Geometry
Magnetic dipole moment
Magnetic domains
Magnetic fields
Magnetic properties
Magnetic properties and materials
Magnetization
Magnets
Material films
Materials science
Metals. Metallurgy
Physics
Stripes
X ray film
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Summary: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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.272.5269.1782