Fig. 5

Fluctuating moments in fields. a Field-dependent magnetic specific heat C_M/T at different temperatures, as indicated. b Temperature-dependent magnetic specific heat C_M/T in different fields. c Temperature-dependent entropy, normalized to R·ln2, assuming doublet ground states. The arrows indicate the magnetic phase transition. d–f Energy-dependent neutron scattering intensity, integrated over wave vector H = [−0.2, 0.2] r.l.u., K = [−1, 1] r.l.u., and L = [0, 2] r.l.u., at different temperatures and fields, as indicated. The red lines are the integrated intensity over the energy spectrum (green shadow area) up to 0.8 meV. The gray bars indicate the instrumental resolution of about ±0.05 meV