Fig. 3. Adiabatic temperature, Tad, as a function of applied magnetic field, B0, along isentropic curves: (a) from experiments and (b) calculated using Hamiltonian (1). The dashed line in (a) relates to the uncertainty in the correction applied to the experimental data below 0.1 K (see ESI†). Inset: the arrow highlights the experimental enhancement of Tad(B0), which becomes noticeable for B0 near ca. 1 T and T < 0.25 K.
