Neutron, electrical, and magnetic investigations of the PrFeO3-PbTiO3 system

The solid solutions of the (1 - x)PrFeO3 - xPbTiO(3) system were explored f or the purpose of finding ferroelectromagnetism. Neutron diffraction data w ere collected at room temperature to 700 degreesC and refined by the Rietve ld method for magnetic and crystal structure analyses. Dielectric permittiv ity (epsilon (r)) and loss tangent were measured by a low-frequency impedan ce analyzer for varying frequency. The hysteresis curves of the polarizatio n-electric field and magnetization-magnetic field were measured at room tem perature. At room temperature, the crystal structure symmetry of the solid solutions change from orthorhombic to tetragonal i.e., Pbnm, 14 cm, and P4 nim. with increasing PbTiO3 content. The solid solution at x = 0.8 undergoe s structural transition from tetragonal to cubic phase with increasing temp erature in a series of 14 cm, 14/mcm (P4/mmm), and Pm3m. The solid solution composition of 0.4 less than or equal to x less than or equal to 0.6 exhib ited ferromagnetism and the compositions of x greater than or equal to 0.4 were ferroelectric.