Bimodal properties of a patterned magnetic nanostructure: Separation of individual components' contributions

We study the properties of magnetic islands with perpendicular magnetization (dots), hundred nanometres in lateral size, embedded in a magnetic matrix, by magneto-optical method exploiting Kerr effect and magnetic force microscopy. Due to a complex structure the investigated patterned system display...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2013-11, Vol.345, p.82-88
Main Authors: SVEKLO, I, KURANT, Z, MAZIEWSKI, A, SIECZKOWSKA, E, PETROUTCHIK, A, BACZEWSKI, L. T, WAWRO, A
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Ellipticity
Exact sciences and technology
Hysteresis loops
Kerr effects
Magnetic fields
Magnetic properties
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetization
Magnetization reversal
Materials science
Methods of nanofabrication
Nanoscale pattern formation
Nanostructure
Physics
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Summary:We study the properties of magnetic islands with perpendicular magnetization (dots), hundred nanometres in lateral size, embedded in a magnetic matrix, by magneto-optical method exploiting Kerr effect and magnetic force microscopy. Due to a complex structure the investigated patterned system displays a bimodal character. In order to gain an insight into behaviour of the components we apply a simple approach for decomposition of bimodal hysteresis loops obtained from magneto-optical measurements. The hysteresis loops of subsystems are determined from the field dependent rotation of a plane polarization and ellipticity of a laser beam reflected from the sample surface. Comparison with the adequate reference samples reveals differences in the behaviour of the patterned system resulting from confined size of the dots and their dipole coupling with the matrix. Magnetization reversal mechanisms of the individual components are discussed in details.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2013.05.061