Magnetic Nanoparticle Assemblies

Details Magnetic Nanoparticle Assemblies Magnetic Nanoparticle Assemblies

2009-07-25

arxiv.org/abs/0907.4417v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

33 pages, 8 Figures; To appear in "Handbook of Nanophysics. Vol.3 : Nanoparticles and Quantum Dots " (ed.K.Sattler) (Taylor&Fr

Scientific paper

This chapter provides an introduction to the fundamental physical ideas and models relevant to the phenomenon of magnetic hysteresis in nanoparticle assemblies. The concepts of single-domain particles and superparamagnetism are discussed. The mechanisms of magnetization by coherent rotation and the role of temperature in the gradual decay of magnetization are analyzed in the framework of simple analytical models. Modern numerical techniques (Monte Carlo simulations, Magnetization Dynamics) used to study dense nanoparticle assemblies are presented. An overview of the most common experimental techniques used to measure the magnetic hysteresis effect in nanoparticle assemblies are presented and the underlying principles are exposed.

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