The hydrostatic pressure eŠect on multiferroic properties of rare-earth manganites RMnO3 (R＝Dy, Tb, and Gd) with the Pbnm orthorhombic structure was investigated by using a diamond anvil cell. Under high pressures, all of these manganites were found to exhibit ferroelectricity in which spontaneous polarization (≈100 nC cm－2) develops along the a axis. The application of a magnetic field B along the a axis to the high-pressure ferroelectric phase causes a drastic change in the electric polarization P. Especially in GdMnO3, the B-induced change in P reached DP(B)＝1.3 nC cm－2. A possible origin of the observed R-dependent pressure eŠect is discussed.
|Number of pages||6|
|Journal||Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu|
|Publication status||Published - 2019|
- Diamond anvil cell
- Dielectric constant
- Phase transition