Magnetomechanical effects in the elastic polymer composites containing different volume fraction of ferromagnetic powder particles

TL;DR

This paper provides a thermodynamic analysis of magnetomechanical effects in elastic polymer composites with ferromagnetic particles, focusing on magnetic free energy, interactions, and resulting mechanical forces.

Contribution

It offers a detailed thermodynamic framework for understanding magnetomechanical interactions in ferromagnetic particle-polymer composites, including energy estimates and force calculations.

Findings

Magnetostatic interaction energy depends on particle distribution.

Magnetostatic forces induce volume changes in the composite.

The study quantifies the mechanical forces from magnetic interactions.

Abstract

In the present work a detailed thermodynamic consideration for the magnetic free energy of the composite material consisting of the ferromagnetic powder particles embedded into a polymer matrix is given. We estimate their magnetostatic interaction energy and its dependence on the microscopic distribution of the magnetization and the magnetic field in the composite material. We also define the hydrostatic component of the mechanical force developed and the volume change effect caused by the magnetostatic interactions in such composites.