neutron study of the new pressure induced commensurate phase in RMn2O5 multiferroics
RMn2O5 multiferroics show complex magnetic structures, highly sensitive to pressure with strong consequences on the ferroelectric properties. The magnetism and chemical pressure of the R3+ ion also have a strong impact on these properties. In YMn2O5 where Y is non magnetic, we recently discovered new pressure induced commensurate phase by high pressure neutron diffraction (up to 4 GPa and 7 GPa on G61 and D20 respectively). We propose to study this new phase under very high pressure in 2 compounds with magnetic rare earth: TbMn2O5, where our preliminary data show that this phase indeed exists, and DyMn2O5, where it could perhaps be identified to the X para electric phase previously detected by measurements of the electric polarisation.
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DEUTSCH Maxime; BALEDENT Victor; FERNANDEZ DIAZ Maria Teresa; FOURY LEYLEKIAN Pascale; Thomas C. Hansen; I. MIREBEAU; WEI PENG and PETIT Sylvain. (2016). neutron study of the new pressure induced commensurate phase in RMn2O5 multiferroics. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2446
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