Tunable dynamic response of magnetic gels: impact of structural properties and magnetic fields

Abstract

Ferrogels and magnetic elastomers feature mechanical properties that can be reversibly tuned from outside through magnetic fields. Here we concentrate on the question how their dynamic response can be adjusted. The influence of three factors on the dynamic behavior is demonstrated using appropriate minimal models: first, the orientational memory imprinted into one class of the materials during their synthesis; second, the structural arrangement of the magnetic particles in the materials; and third, the strength of an external magnetic field. To illustrate the latter point, structural data are extracted from a real experimental sample and analyzed. Understanding how internal structural properties and external influences impact the dominant dynamical properties helps to design materials that optimize the requested behavior.

arXiv comment10 pages, 5 figures

References in corpus (3)

• Magnetic properties of colloidal suspensions of interacting magnetic particles
• Structural control of elastic moduli in ferrogels and the importance of non-affine deformations
• Hardening transition in a one-dimensional model for ferrogels

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• Tunable dynamic moduli of magnetic elastomers: from X-$\mu$CT characterization to mesoscopic modeling
• Effect of single-particle magnetostriction on the shear modulus of compliant magnetoactive elastomers
• Dynamics in a one-dimensional ferrogel model: relaxation, pairing, shock-wave propagation
• A density functional approach to ferrogels
• Depolarized light scattering from prolate anisotropic particles: the influence of the particle shape on the field autocorrelation function
• Thermophoretically induced large-scale deformations around microscopic heat centers
• Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields