Polydispersity-linked Memory Effects in a Magnetic Nanoparticle System

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dc.creatorChakraverty, 1. S.
dc.creatorFrydman, 2. A.
dc.creatorBandyopadhyay, 3. M.
dc.creatorDattagupta, 4. S.
dc.creatorSreeram, 5. Surajit Sengupta 6. P. A.
dc.date2004-07-08
dc.date.accessioned2026-07-07T02:59:06Z
dc.date.available2026-07-07T02:59:06Z
dc.descriptionWe have performed a series of measurements on the low temperature behavior of a magnetic nano-particle system. Our results show striking memory effects in the dc magnetization. Dipolar interactions among the nano-particles {\em suppress} the memory effect. We explain this phenomenon by the superposition of different super paramagnetic relaxation times of single domain magnetic nano- particles. Moreover, we observe a crossover in the temperature dependence of coercivity. We show that a dilute dispersion of particles with a flat size distribution yields the best memory.
dc.identifierhttps://arxiv.org/abs/cond-mat/0407202
dc.identifierhttp://arxiv.org/abs/cond-mat/0407202
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24378
dc.subjectMaterials Science
dc.titlePolydispersity-linked Memory Effects in a Magnetic Nanoparticle System
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