As the growing requirement for high temperature piezoelectric materials in spintronics, information storage, sensors,
actuators and device used in extreme conditions, materials
based on the BiFeO3–PbTiO3 (BF–PT) system have drawn
considerable attentions for their high Curie temperature and the
coexistence of ferroelectric and ferromagnetic orderings[1–7].
In addition, modifications including rare earth and third phase
dopants have been introduced in to improve the insulativity
and decrease the internal mechanical stresses in BF–PT system
[3,8,9]. Works on La modified BF–PT ceramics exhibited
decreased internal stresses, enhanced multiferroic, piezoelectric
and highly insulated properties simultaneously[10,11]. Especially, (1x)(Bi0.85La0.15)FeO3–xPbTiO3 [(1x)BLF–xPT]
reveals greatly dielectric stability to frequency and decreased
loss below 3% of all the compositions while the Curie
temperature remains around 4151C indicating potential application in high temperature devices