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Title: Spatially correlated disorder in self-organized precursor magnetic nanostructures
Author: Porta Tena, Marcel
Castán i Vidal, Maria Teresa
Lloveras, Pol
Planes Vila, Antoni
Saxena, A. (Avadh)
Keywords: Propietats magnètiques
Estructura electrònica
Magnetic properties
Electronic structure
Issue Date: 2007
Publisher: The American Physical Society
Abstract: We study the scaling behavior of the characteristic length of precursor magnetic nanostructures above the Curie temperature with the correlation length of quenched-in disorder. We found that the modulation length of the nanostructures follows the scaling law D ¯ , where Dis the average size of the magnetized regions in the material. The scaling behavior of the average size of these regions, D¯ , with the correlation length of the disorder, , depends on the properties of the disorder. For Gaussian disorder, we find that Dscales with the disorder correlation length as D a/2 , where a is the exponent of the leading term of the pair correlation function of the disorder in the limit r → 0, r 1� 1/ ar / a . These results are quite general and applicable to other systems, e.g., ferroelectric precursors, independent of the nature of the long-range dipolar forces.
Note: Reproducció digital del document publicat en format paper, proporcionada per
It is part of: Physical Review B, 2007, vol. 76, núm. 5, p. 054432-1-054432-7
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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