A thermodynamical model for paleomagnetism in Earth’s crust

A thermodynamically consistent model for soft deformable viscoelastic magnets is formulated in actual space (Eulerian) coordinates. The possibility of a ferro-paramagnetic-type (or ferri-antiferromagnetic) transition exploiting the Landau phase-transition theory as well mechanical melting or solidification considered, being motivated and applicable to paleomagnetism (involving both thermo- isothermal viscous remanent magnetization) rocks Earth’s crust rock-magma transition. temperature-dependent Jeffreys rheology deviatoric part combined with Kelvin-Voigt spherical (volumetric) used. energy balance entropy imbalance behind are demonstrated, its analysis performed by time discretization, proving existence weak solutions.