Effect of Zr Doping on Structural and Ferroelectric Properties of Lead-Free Bi0.5(Na0.80K0.20)0.5TiO3 Films

Influence of Crystallization Time on Energy-Storage Density and Efficiency of Lead-Free Bi0.5(Na0.8K0.2)0.5TiO3 Thin Films

“…All other peaks belong to a single-phase perovskite structure with no other impurity phases detected, which agrees with our recent report [25] on influence of crystallization temperature on multiferroic behaviour of BNKT films. This observation also matches our previous works [26,27] where they indicated that BNKT thin films possess simultaneously the rhombohedral and tetragonal symmetries. Among the typical orientations of the perovskite structure, the (110)/(200) peaks possess high intensity and therefore are the preferred orientations of the films.…”

Influence of heterostructure on structure, electric and magnetic properties of Bi0.5(Na0.80,K0.20)0.5TiO3/BaZrO3 films prepared by the sol–gel method

“…The phase structure of BNKT multilayer film is typified by the peaks (marked by a $ sign), as (110) at around 32°and (200) at around 47°. This observation matches with previous works, 13,22) which reported that BNKT films possess an MPB component with rhombohedral and tetragonal symmetries. The cubic structure of BZO film shows the characteristic peaks (marked by a @ sign) as (100) at 30°and (200) at 43°.…”

“…12) Among lead-free materials, the Bi(Na,Ka)TiO3 (BNKT) system is thought to be a potential candidate and likely replacement for PZT, because similar to Pb 2+ , Bi 3+ ions possess strong polarizability. 13) Earlier studies showed that BNKT compounds at the morphotropic phase boundary (MPB) reveal excellent electromechanical behaviors and coupling. 14) Their key properties such as remnant polarization (Pr ∼ 38 μC cm −2 ), piezoelectric coefficient (d 33 ∼ 167 pC N -1 ) or electromechanical coupling coefficient (k 33 ∼ 0.56) are able to compare with those of PZT.…”

Influence of Crystallization Temperature on Structural, Ferroelectric, and Ferromagnetic Properties of Lead-Free Bi0.5(Na0.8K0.2)0.5TiO3 Multiferroic Films

“…e crystalline structures of BNKT films are deduced from X-ray diffraction patterns in the 2θ ranges of 25°-75°s hown in Figure 2(a). All films are well crystallized corresponding to the single-phase perovskite structure, and no other impurity phases are detected [19,20]. BNKT films in this study possess the optimal composition near the MPB evidenced by the coexisting of rhombohedral and tetragonal phases [21].…”