title: Thermodynamic restrictions on linear reversible and irreversible thermo-electro-magneto-mechanical processes.
abstract: A unified thermodynamic framework for the characterization of functional materials is developed. This framework encompasses linear reversible and irreversible processes with thermal, electrical, magnetic, and/or mechanical effects coupled. The comprehensive framework combines the principles of classical equilibrium and non-equilibrium thermodynamics with electrodynamics of continua in the infinitesimal strain regime. In the first part of this paper, linear Thermo-Electro-Magneto-Mechanical (TEMM) quasistatic processes are characterized. Thermodynamic stability conditions are further imposed on the linear constitutive model and restrictions on the corresponding material constants are derived. The framework is then extended to irreversible transport phenomena including thermoelectric, thermomagnetic and the state-of-the-art spintronic and spin caloritronic effects. Using Onsager's reciprocity relationships and the dissipation inequality, restrictions on the kinetic coefficients corresponding to charge, heat and spin transport processes are derived. All the constitutive models are accompanied bymultiphysics interaction diagramsthat highlight the various processes that can be characterized using this framework.
authors.affiliation: Department of Applied Mechanics, Indian Institute of Technology Delhi, New Delhi, 110016, India; Department of Mechanical Engineering, Polytechnic University of Puerto Rico, San Juan, 00918, Puerto Rico.
authors.forename: Sushma
authors.initials: S
authors.lastname: Santapuri
keywords: Applied mathematics; Materials science; Thermodynamics