Dynamic Constitutive Relations for Polarization and magnetization
James R. Baker-Jarvis, Pavel Kabos
New engineered artificial and metamaterials combine ferroelectrics, ferrites, wires, resonant rings, and ferromagnetic materials to obtain a desired response. In this paper we develop constitute relations for materials where the magnetization and polarization may depend on both the electric and magnetic fields. The approach is very general and is based on a previously developed statistical-mechanical theory. We include the quadrupole-moment density as well as the dipole-moment density in the displacement field. This leads to reference-position invariance in Maxwell's equations. Generalizations of Debye and Landau-Fifshitz equations of motion are presented which are valid for nonequilibrium and contain memory. The generalized equations are shown to consist of reversible and irreversible components. The reversible and relaxation terms in the polarization and magnetization evolution equations include the possibility of magnetoelectric coupling. We derive Maxwell's equations from a Hamiltonian approach using the constitutive relationships. We contrast chiral response of free charge traveling on a wire spiral with magnetoelectric response.
Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)
and Kabos, P.
Dynamic Constitutive Relations for Polarization and magnetization, Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=27908
(Accessed March 2, 2024)