Figure 1: Signatures of the field-induced magnetic phases.

(a) Time profile of a field pulsed up to 38 T, and time dependence of the diffracted intensity at Q=(0.6 0 0) and T=2 K, Q=(1.6 0 −1) and T=2 K, and Q=(0.6 0 0) and T=18 K, in fields up to 38 T, integrated within time steps Δt=1 ms. The error bars ΔI are given by the square root of the neutron counts (, where τ is the total accumulation time over several pulses). (b) Magnetization versus magnetic field at T=1.5 K (from ref. 33) and magnetic field–temperature phase diagram deduced from magnetoresistivity versus temperature and versus field, in falling fields (from ref. 23). (c) Field dependence of the same diffracted intensities in fields up to 40.5 T, integrated within field steps Δ(μ₀H)=0.5 T. Open and full symbols correspond to rising and falling fields, respectively. The magnetic field has been applied along the easy magnetic axis c with a tilt of 4.2° along a.