Fig. 1: Heat capacity of Na2Co2TeO6.
From: Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6
a Temperature dependence of the magnetic specific heat of NCTO for different magnetic fields up to 14 T. The inset shows the differential magnetic specific heat dCmag/dT, and three transitions are observed as TN, TF, and T*, respectively. b The magnetic entropy Smag(T) at 0, 9, and 12 T. The olive dashed line refers to Smag(T → ∞) calculated with effective spin Jeff = 1/2 for Co2+. In order to better observe the residual magnetic entropy, the Smag(T) curves are shifted vertically so that their maxima coincide with the Smag(T → ∞). The black, red, and blue dashed line refer to the possible residual magnetic entropy below 2 K under different magnetic field. Compared with the total magnetic entropy Smag(T → ∞), the percentage of residual magnetic entropy in different magnetic fields is shown in the figure. c A zoom-in of magnetic entropy below TN at various magnetic fields. Note the data are not shifted vertically as opposed to (b). The inset shows the field dependence of the Smag at 17 K.
