Oscillating adiabatic temperature change of diamagnetic materials

The fundamental model to describe a diamagnetic material is an electron gas; and a huge applied magnetic field promotes a degeneracy, named Landau levels. Oscillations on the thermodynamic quantities are found when the Landau levels cross the Fermi energy of the non-perturbed gas at low temperatures regime ( ε F ⪢ k B T ). The adiabatic temperature change Δ T characterizes the magnetocaloric properties and here this quantity is described for the system above mentioned. We show that Δ T oscillations are possible to be found in Gold in standard values of temperature and magnetic field; c.a.2 K and 8.5 T. These oscillations are around zero, i.e., both, normal and inverse magnetocaloric effect arises and a possible application of this effect is in magnetic field sensor, since this system is sensible to 0.8 mT with a thermal response of 50 mK (at 2.56 K).