High magnetoelectric coupling in piezoelectric modified BNT and magnetic NZFO particulate composite

Enhanced Electrostrictive Behavior in BNT-Based Ternary Piezoceramics via Antiferroelectric Domain Engineering

“…High-performance piezoelectric (PE) ceramics have gained enormous scientific interest in diverse technological domains, including aerospace and power engineering, due to their electromechanical characteristics. , The piezoelectricity that arises in such materials is the consequence of inherent anharmonic lattice distortions within the noncentrosymmetric (or disordered) crystal structure . Perovskite (ABO 3 structure) Bi 0.5 Na 0.5 TiO 3 (BNT)-based ferroelectrics (FEs) have been convincingly dominating the field since the past decade due to their high PE performance (electro-strain, S > 0.1%). − However, for fabricating new-generation devices, the material should exhibit high S (>0.15%) at the cost of minimal applied electric field ( E ) (<70 kV/cm) . To accomplish this, researchers have introduced either a normal or an ergodic relaxor FE phase in the BNT-based system near the morphotropic phase boundary (MPB) regime. − In accordance with the Goldschmidt interpretation of MPB, the normal FE phase allows easy rotation of P vectors in external E , whereas the relaxor phase causes the P extension mechanism due to the formation of long-range ordered nanopolar regions (NPRs) .…”