| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Thermodynamics of Materials in Extreme Environments
|
| Presentation Title |
A Thermodynamic Equation of Motion for Coupled Transport in Magnetite |
| Author(s) |
Deepak Dhariwal, Michael von Spakovsky, William T. Reynolds |
| On-Site Speaker (Planned) |
Deepak Dhariwal |
| Abstract Scope |
An nonequilibrium thermodynamic model for coupled transport in magnetic ferrites is formulated based on the steepest-entropy-ascent quantum thermodynamics (SEAQT) framework. This framework, based on the maximum entropy production principle, satisfies the laws of thermodynamics and mechanics and is applicable at all temporal and spatial scales even in the far-from-equilibrium realm. The SEAQT framework is used to determine energy dissipation from coupled mass, charge, spin and heat transport. Energy spectra for electrons is obtained from spin-density functional theory, for magnons from linear spin-wave theory, and for phonons from density-functional-perturbation theory. Given the calculated density of energy eigenstates of an oxide-ferrite, nonequilibrium system evolution and non-quasi-equilibrium interactions are predicted in state space from the path of steepest entropy ascent determined from the SEAQT equation of motion. |