| Magnetic anisotropy of elongated thin ferromagnetic nano-islands for artificial spin ice arrays. | |
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MedLine Citation:
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PMID: 22729157 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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. |
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Authors:
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G M Wysin; W A Moura-Melo; L A S Mól; A R Pereira |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-22 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 24 ISSN: 1361-648X ISO Abbreviation: - Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: - |
Other Details:
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Languages: ENG Pagination: 296001 Citation Subset: - |
Affiliation:
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Department of Physics, Kansas State University, Manhattan, KS 66506-2601, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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