Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Pressure-induced commensurate order in TbMn2O5 and DyMn2O5: Influence of rare-earth anisotropy and 3d-4 f exchange
Deutsch, M.; Peng, W.; Foury-Leylekian, P.; Baledent, V.; Chattopadhyay, S.; Fernandez-Diaz, M. T.; Hansen, T. C.; Forget, A.; Colson, D.; Greenblatt, M.; Lepetit, M.-B.; Petit, S.; Mirebeau, I.;
The magnetic structure of TbMn2O5 and DyMn2O5 multiferroics has been studied by high-pressure neutron diffraction in a large pressure range up to 6.6 GPa. In both cases, we observe a pressure-induced commensurate magnetic phase with propagation vector ( 1/2 0 1/2 ), growing with pressure at the expense of the ambient pressure phases. Being previously observed in YMn2O5 and PrMn2O5, this phase is most likely a generic feature of the RMn2O5 multiferroic family. A simple model is proposed to explain qualitatively the emergence of this pressure-induced phase. Differences between TbMn2O5 and DyMn2O5 behaviors at ambient and low pressures provide clues on the interaction scheme.

Publ.-Id: 27793 - Permalink