Dynamic magnetic response of a ferrofluid in a static uniform magnetic field
| Autor: | Ekaterina A. Elfimova, Alexey O. Ivanov, Philip J. Camp, Yuliya E. Nekhoroshkova, Vladimir S. Zverev, Timur M. Batrudinov, Egor I. Paramonov |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Ferrofluid
STATIC SUSCEPTIBILITY FREQUENCY DEPENDENT 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Magnetization UNIFORM MAGNETIC FIELDS MEAN FIELD THEORY 0103 physical sciences VOLUME CONCENTRATION BROWNIAN DYNAMICS SIMULATIONS MODIFIED MEAN FIELDS PARTICLE CONCENTRATIONS FREQUENCY DISPERSION Physics Condensed matter physics MAGNETIC FIELDS MAGNETIC FLUIDS 021001 nanoscience & nanotechnology Magnetic susceptibility Magnetic field Dipole Brownian dynamics Particle 0210 nano-technology MAGNETIC SUSCEPTIBILITY Magnetic dipole–dipole interaction |
| Zdroj: | Batrudinov, T M, Nekhoroshkova, Y E, Paramonov, E I, Zverev, V S, Elfimova, E A, Ivanov, A O & Camp, P J 2018, ' Dynamic magnetic response of a ferrofluid in a static uniform magnetic field ', Physical Review E, vol. 98, no. 5 . https://doi.org/10.1103/PhysRevE.98.052602 Phys. Rev. E Physical Review E |
| DOI: | 10.1103/PhysRevE.98.052602 |
| Popis: | A theory for the frequency-dependent magnetic susceptibility of a ferrofluid in a static uniformmagnetic field is developed, including the dipolar interactions between the constituent particles.Interactions are included within the framework of modified mean-field theory. Predictions are givenfor the linear responses of the magnetization to a probing ac field both parallel and perpendicularto the static field, and are tested against results from Brownian dynamics simulations. The effectsof particle concentration and dipolar coupling constant on the field-dependent static susceptibilitiesand the frequency dispersions are shown to be substantial, which justifies taking proper account ofthe interactions between particles. The theory is reliable provided that the volume concentrationand dipolar coupling constant are not too large, and within the range of values for real ferrofluids. |
| Databáze: | OpenAIRE |
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