Low temperature phenomena in ferroic $BiMO3–PbTiO3$ (M: Mn and Sc) Available to Purchase

Low temperature, reversible mechanical effects in $BiMnO3–PbTiO3$ are shown to be analogous to those reported in multiferroic $BiFeO3$⁠. The same stiffening (on cooling) has been found in ferroelectric $BiScO3–PbTiO3$ that shows negligible conduction. This has allowed permittivity and polarization studies, not possible in $BiMnO3–PbTiO3$⁠, to be accomplished. Results indicate mechanical effects to be associated with a phase transition, most probably governed by an order parameter other than electric polarization, but to which it is coupled. The possibility of a common origin for the effects in the three Bi-containing perovskites is discussed, along with implications on the multiferroicity of $BiMnO3–PbTiO3$⁠.