Cascade of dynamic and equilibrium magnetization steps in a Mn²⁺-based spin trimer in pulsed magnetic field

We investigated the magnetization process of Mn²⁺ -based spin trimer hybrid halide by measuring the magnetization and differential susceptibility in pulsed magnetic field up to 60 T. In equilibrium with the rate of change of magnetic field slow at temperatures below which the correlation between spins form, the magnetization rapidly approaches a 1/3 magnetization plateau at low fields with collinear up-down-up spin structure and five subsequent magnetization plateaus from energy level crossings at 7/15, 9/15, 11/15, 13/15 of before saturation magnetization were observed at higher fields. On the other hand, numerous additional magnetization plateaus below 1/3 plateau and two additional peaks between the plateaus at higher fields in the differential susceptibility appeared in pulsed magnetic field experiment where the rate of change of magnetic field exceeds 5000 T/s. More interestingly, the fraction of 1/3 plateau reduces to 3/11 with increasing the rate of magnetic field change at low temperature. In this presentation, we discuss diabatic transition and the role of phonons that drastically transform the magnetization process in pulsed magnetic field based on Landau-Zener effect.