Fig. 7.

Quantum critical scaling and universality of YbAlO₃. a Field-dependent magnetization M measured at different temperatures. b Critical scaling of the magnetic susceptibility in a, for fields both below and above B_s. c Temperature-dependent magnetic specific heat C_M/T measured at different fields. d Critical scaling of the field-dependent magnetic specific heat ΔC_M/T shown in c. e Field-dependent magnetic specific heat C_M/T at different temperatures. The red dashed line indicates the saturation field B_s = 1.1 T at the minimum, and crossovers with two broad maximum shoulders are observed. f Contour plot of the magnetic specific heat C_M as a function of temperature and field. Magnetic phase boundaries extracted through different measurements are over-plotted. The red circles indicate the saturation field B_s at different temperatures, and the empty stars indicate the crossover defined through the field-dependent specific heat maxima