Torque studies of large-area Co arrays fabricated by etched nanosphere lithography

Journal Article · Sun May 15 04:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1849665· OSTI ID:20711652

Weekes, S M; Ogrin, F Y ^[1]

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1. School of Physics, University of Exeter, Exeter, EX4 4QL (United Kingdom)

Large-area arrays of size-tunable Co nanomagnets have been fabricated using a methodology based on nanosphere lithography. The technique employs a monolayer of latex spheres as an inverse mask for the formation of Co elements by electrodeposition. By tuning the size of the spheres with reactive ion etching, magnetic elements of 310 and 240 nm diameter have been obtained. Analysis of the arrays using high-field torque magnetometry and three-dimensional micromagnetic modeling clearly demonstrates a change in anisotropy as the diameter of the elements is reduced. More detailed investigation of the field dependence indicates the presence of magnetic vortices at low fields.

• OSTI ID: 20711652
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 97; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COBALT
ELECTRODEPOSITION
ETCHING
FERROMAGNETIC MATERIALS
LATEX
MAGNETIC FLUX
NANOSTRUCTURES
NUMERICAL ANALYSIS
SIMULATION
THREE-DIMENSIONAL CALCULATIONS
TORQUE