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arXiv · 0812.4282

Observation of superspin glass state in magnetically textured ferrofluid (gamma-Fe2O3)

Sawako Nakamae·Youssef Tahri·Caroline Thibierge·Denis L'Hôte·Eric Vincent·Vincent Dupuis·Emmanuelle Dubois·Régine Perzynski
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Abstract

Magnetic properties in a magnetically textured ferrofluid made out of interacting maghemite (gamma-Fe2O3) nanoparticles suspended in glycerin have been investigated. Despite the loss of uniform distribution of anisotropy axes, a superspin glass state exists at low temperature in a concentrated, textured ferrofluid as in the case of its non-textured counterpart. The onset of superspin glass state was verified from the sample's AC susceptibility. The influence of the anisotropy axis orientation on the aging behavior in the glassy states is also discussed.

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Sawako Nakamae, Youssef Tahri, Caroline Thibierge, Denis L'Hôte, Eric Vincent, Vincent Dupuis, Emmanuelle Dubois, Régine Perzynski. 2009-03-30. Observation of superspin glass state in magnetically textured ferrofluid (gamma-Fe2O3). https://doi.org/10.1063/1.3072383

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