Pr substituted Bi3Fe5O12crystallites were prepared by a hydrothermal method using Pr(NO3)•6H2O, Fe(NO3)•9H2O and Bi(NO3)3•5H2O as raw materials. XRD, SEM and PPMS were used to analyzed crystal phase, morphology and magnetism of the crystallites, respectively. XRD result showed that the Pr-substituted crystallites of different ratio present cubic garnet phase without impure phase; SEM result showed that morphology of the crystallites varies with the substitution ratio of Pr. Moreover, magnetism of the crystallites was studied. The crystallites present antiferromagnitsm.

We investigate the magnetic and ferroelectric behaviors of 5d Ir4+ substituted Mn1−xIrxWO4 + δ samples. The electric polarization is enhanced to a certain extent due to the Ir substitution of Mn. Furthermore, the non-polar AF1 phase is partially suppressed by the ferroelectric AF2 phase, resulting in the coexistence of the two phases below TAF1. It is suggested that the lattice distortion, the suppressed magnetic moment, and the increased Dzyaloshinskii–Moriya interaction are the key reasons for the enhanced polarization and the stabilized ferroelectric AF2 phase.