NED-AdS black holes, extended phase space thermodynamics and Joule-Thomson expansion

We study and discuss the critical behaviour of charged by nonlinear electrodynamics (NED) AdS black holes in an extended phase space. The negative cosmological constant is treated as a thermodynamic pressure and the black hole mass is considered as the chemical enthalpy. We show the analogy of ther-modynamics and phase transitions studied with the Van der Walls liquid-gas system. We introduce new thermodynamic quantities conjugated to the NED coupling and a magnetic charge. It was demonstrated that the first law of black hole thermodynamics and the Smarr relation hold. We have calculated the Joule-Thomson thermodynamic coefficient and inversion temperature, and the Joule-Thomson adiabatic expansion is investigated.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.