Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/18810
Title: Relaxation dynamics in suspensions of ferromagnetic particles
Author: Miguel López, María del Carmen
Rubí Capaceti, José Miguel
Keywords: Propietats acústiques
Propietats mecàniques
Matèria condensada
Reologia
Física estadística
Termodinàmica
Propietats magnètiques
Acoustic properties
Mechanical properties
Condensed matter
Rheology
Statistical physics
Rheology
Magnetic properties
Thermodynamics
Issue Date: 1995
Publisher: The American Physical Society
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.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.51.2190
It is part of: Physical Review E, 1995, vol. 51, núm. 3, p. 2190-22198
URI: http://hdl.handle.net/2445/18810
ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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