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Out-of-equilibrium dynamics in superspin glass state of strongly interacting magnetic nanoparticle assemblies

Sawako Nakamae 1
1 SPHYNX - Systèmes Physiques Hors-équilibre, hYdrodynamique, éNergie et compleXes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : Interacting magnetic nanoparticles display a wide variety of magnetic behaviors ranging from modified superparamagnetism, superspin glass to possibly, superferromagnetism. The superspin glass state is described by its slow and out-of-equilibrium magnetic behaviors akin to those found in atomic spin glasses. In this article, recent experimental findings on superspin correlation length growth and the violation of the fluctuation-dissipation theorem obtained in concentrated frozen ferrofluids are presented to illustrate certain out-of-equilibrium dynamics behavior in superspin glasses.
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Submitted on : Wednesday, October 19, 2016 - 3:56:52 PM
Last modification on : Monday, February 10, 2020 - 6:14:06 PM

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Sawako Nakamae. Out-of-equilibrium dynamics in superspin glass state of strongly interacting magnetic nanoparticle assemblies. Journal of Magnetism and Magnetic Materials, Elsevier, 2014, 355, pp.225 - 229. ⟨10.1016/j.jmmm.2013.12.018⟩. ⟨cea-01384258⟩

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