Oscillating magneto- and electrocaloric effects on bilayer graphenes

• The oscillating magnetocaloric effect of a bilayer graphene is analyzed.
• The influence of a electric field is also considered.
• Results for bilayer graphenes are very similar to those for monolayer.
• There is no Joule heating since the gate potential is applied between the two layers.

Recently, the oscillating magnetocaloric effect (OMCE) was proposed and theoretical verified as an intrinsic property of diamagnetic materials; and then it was further optimized considering a monolayer graphene. OMCE biased by an electric field was also deeply investigated, but Joule heating was a problem to be overcome. The present effort thus goes further and analysis of the OMCE of biased bilayer graphene under an electric and magnetic field is carried out. General expressions for the thermodynamic potentials are derived and then the entropy change and the adiabatic temperature change are investigated. We found that the results for bilayer graphenes are very similar to those for monolayer and, in addition, the Joule heating problem could be overcome, since the gate potential is applied between the two layers.