Magnetic anisotropy of elongated thin ferromagnetic nano-islands for artificial spin ice arrays

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dc.contributor.author Wysin, Gary M.
dc.contributor.author Moura-Melo, W. A.
dc.contributor.author Mol, L. A. S.
dc.contributor.author Pereira, A. R.
dc.date.accessioned 2012-09-10T20:32:17Z
dc.date.available 2012-09-10T20:32:17Z
dc.date.issued 2012-09-10
dc.identifier.uri http://hdl.handle.net/2097/14677
dc.description.abstract The energetics of thin elongated ferromagnetic nano-islands is considered for some different shapes, aspect ratios, and applied magnetic field directions. These nano-island particles are important for artificial spin-ice materials. For low temperature, the magnetic internal energy of an individual particle is evaluated numerically as a function of the direction of a particle’s net magnetization. This leads to estimations of effective anisotropy constants for (1) the easy axis along the particle’s long direction, and (2) the hard axis along the particle’s thin direction. A spin relaxation algorithm together with fast Fourier transform for the demagnetization field is used to solve the micromagnetics problem for a thin system. The magnetic hysteresis is also found. The results indicate some possibilities for controlling the equilibrium and dynamics in spin-ice materials by using different island geometries. en_US
dc.relation.uri http://iopscience.iop.org/0953-8984/24/29/296001 en_US
dc.rights This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics: Condensed Matter. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at doi:10.1088/0953-8984/24/29/296001. en_US
dc.subject Magnetic anisotropy en_US
dc.subject Magnetic hysteresis en_US
dc.subject Micromagnetics en_US
dc.subject Spin-ice en_US
dc.subject Effective potential en_US
dc.title Magnetic anisotropy of elongated thin ferromagnetic nano-islands for artificial spin ice arrays en_US
dc.type Article (author version) en_US
dc.date.published 2012 en_US
dc.citation.doi doi:10.1088/0953-8984/24/29/296001 en_US
dc.citation.epage 296001 en_US
dc.citation.issue 29 en_US
dc.citation.jtitle Journal of Physics: Condensed Matter en_US
dc.citation.spage 296001 en_US
dc.citation.volume 24 en_US
dc.contributor.authoreid wysin en_US

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