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1995

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/18810

Relaxation dynamics in suspensions of ferromagnetic particles

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http://dx.doi.org/10.1103/PhysRevE.51.2190

Abstract

We have studied the relaxation dynamics of a dilute assembly of ferromagnetic particles in suspension. A formalism based on the Smoluchowski equation, describing the evolution of the probability density for the directions of the magnetic moment and of the axis of easy magnetization of the particles, has been developed. We compute the rotational viscosity from a Green-Kubo formula and give an expression for the relaxation time of the particles which comes from the dynamic equations of the correlation functions. Concerning the relaxation time for the particles, our results agree quite well with experiments performed on different samples of ferromagnetic particles for which the magnetic energy, associated with the interaction between the magnetic moments and the external field, or the energy of anisotropy plays a dominant role.

Subject

Propietats acústiques, Propietats mecàniques, Matèria condensada, Reologia, Física estadística, Termodinàmica, Propietats magnètiques

Subject (English)

Acoustic properties, Mechanical properties, Condensed matter, Rheology, Statistical physics, Rheology, Magnetic properties, Thermodynamics

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Articles publicats en revistes (Física de la Matèria Condensada)

Citation

MIGUEL LÓPEZ, María del Carmen and RUBÍ CAPACETI, José Miguel. Relaxation dynamics in suspensions of ferromagnetic particles. Physical Review E. 1995. Vol. 51, num. 3, pags. 2190-22198. ISSN 1063-651X. [consulted: 16 of May of 2026]. Available at: https://hdl.handle.net/2445/18810

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