Fig. 6.

Field-dependent magnetization and magnetic phase diagram of YbAlO₃. a Field-dependent zero energy soft point at wave vector shift Δq_L = Q_L − 1, extracted from the INS. Normalized magnetization M/M_s, measured at 0.05 K, and the corresponding magnetic susceptibility dM/dB are over plotted. M_s is the saturation moment for fields along the a-axis, and the horizontal dashed lines indicate the 1/3 magnetization plateau. b Field evolution of the energy-dependent inelastic neutron spectrum, at 0.05 K, integrated over wave vector H = [−0.1, 0.1] r.l.u., K = [−0.6, 0.2] r.l.u., L = [0.9, 1.1] r.l.u.. The empty circles indicate the peak positions. c The field-temperature (B−T) magnetic phase diagram. The field-dependent INS spectrum measured at 0.05 K is over plotted, which is integrated over H = [−0.1, 0.1] r.l.u., K = [−0.6, 0.2] r.l.u., L = [0, 2] r.l.u., and E = [0.05, 0.6] meV. The vertical dashed lines indicate the critical field B_c = 0.35 T, and saturation field B_s = 1.13 T, defined through the peak positions of dM/dB