Moreover, the percolation fraction, which is crucial for long-range magnetic ordering, also increases upon phase transformation. For instance, in the m = 6 composition Bi7Ti2.76Fe2.34Mn0.90O21, the magnetic cation content reaches 54% of B-site cations, which is 14% higher than the m = 5 multiferroic Bi6Ti2.99Fe1.46Mn0.55O18 composition that exhibits an MS value of 215 emu/cm 3 . 11 As expected from crystal symmetry, the minor out-of-plane ferroelectric response diminishes with increasing structural reorganization towards the m = 6 phase. Notably, the predominant in-plane piezoresponse of these materials is unaffected by magnetic cation substitution.