Multiferroic Properties of La, Ba Co-Modified BiFeO3-PbTiO3 Crystalline Solutions

Solid solutions of La and Ba modified (1-x)BiFeO
_3-
xPbTiO
₃
were prepared by the mixed oxides method. The 10 at% of La
³⁺
and Ba
²⁺
substituents were utilized to substitute Bi
³⁺
and Pb
²⁺
ions respectively. These cations enter into the crystalline lattice to modify the structure and properties of BiFeO
₃
-PbTiO
₃
. The morphotropic phase boundary of (1-x)(Bi,La)FeO
_3-
x(Pb,Ba)TiO
₃
(BLF-PBT) appears at x=0.4 accompanying by the rhombohedral-tetragonal phase transition. It is found that (1-x)BLF-xPBT reveals enhanced ferroelectric and magnetic properties in the vicinity of the MPB. The remnant polarization and magnetization achieve of 26 μC/cm and 0.06 emu/g, respectively. Our results indicated that (1-x)Bi(Fe,Ga)O
_3-
xPbTiO
₃
is of the insulating and switchable multiferroics.