Super spin dimensionality of a mono-dispersed and densely packed magnetic nanoparticle system

The dynamics of a dense near mono-dispersed assembly of maghemite nanoparticles is investigated by measurements of the temperature dependence of the isothermal remnant magnetization induced by temporal application of weak magnetic fields at constant temperature. The results suggest that the dimensio...

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Veröffentlicht in:	Journal of physics. Conference series 2014-01, Vol.521 (1), p.12012-3
Hauptverfasser:	Andersson, M S, De Toro, J A, Lee, S S, Mathieu, R, Nordblad, P
Format:	Artikel
Sprache:	eng
Schlagworte:	Assembly Constants Dynamic tests Dynamical systems Dynamics Engineering Science with specialization in Solid State Physics High temperature Ising model Magnetic fields Magnetization Nanoparticles Particle spin Physics Teknisk fysik med inriktning mot fasta tillståndets fysik Temperature dependence
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Zusammenfassung:	The dynamics of a dense near mono-dispersed assembly of maghemite nanoparticles is investigated by measurements of the temperature dependence of the isothermal remnant magnetization induced by temporal application of weak magnetic fields at constant temperature. The results suggest that the dimensionality of the super spins of the particles is of Heisenberg character at high temperatures but crossover to become Ising like at lower temperatures.
ISSN:	1742-6596 1742-6588 1742-6596
DOI:	10.1088/1742-6596/521/1/012012