Influence of SrTiO₃ Buffer Layer on the Ferroelectric Properties of Bi₂NiMnO₆ Thin Film

Improved electric property in SrTiO3–Bi2NiMnO6–SrTiO3 sandwich structural thin films

“…respectively. The thickness of BNM film was about 100 nm that has been reported in the previous report (not shown here) [21]. Four peaks (0 0 2), (1 0 2), (1 1 0), and (0 0 4) were observed in the XRD pattern of the sandwich structural STO/BNM/STO thin film.…”

“…The SrTiO 3 (STO) thin layer was prepared by magnetron sputtering (China SKY Technology development Co. Ltd., CAS, JGP-450A) for 30 min. The detailed process could be found in elsewhere [21]. The preparation for BNM precursor solution could be described as follows.…”

Influence of LaNiO3 and LaNi0.5Mn0.5O3 Buffer Layers on the Structural and Electrical Properties of BiNi0.5Mn0.5O3 Thin Films

“…Until now, there have been only a few reports about the ferroelectricity of BNM double perovskite thin films, especially at room temperature. 25 A saturated polarization of about 5 lC/cm 2 was reported by Sakai et al in Bi 2 NiMnO 6 thin films deposited on a SrTiO 3 single-crystal substrate by PLD in 2007, at 7 K. 14 Figure 3 plots the leakage current density (J) versus the applied voltage (V) for the BNM/LNM and BNM/LNO thin films on Pt/Ti/SiO 2 /Si(100) substrates from 15 V to À15 V. Asymmetric J-E characteristics can be observed for the BNM/LNM thin film. The leakage current density was below 7.1 9 10 À3 A/cm 2 at positive bias and 1 9 10 À1 A/ cm 2 at negative bias.…”

Multiferroic Bi2NiMnO6 thin films: A computational prediction

“…50 They measured a polarization of 5 µC/cm 2 and a magnetic Curie temperature of 100 K. Their films displayed a pseudotetragonal structure with a = b = 3.91 Å (matching the substrate) and c = 3.87 Å, described as rather different from the bulk one, while keeping the same rock-salt pattern. 51 Using a chemical solution deposition method, Lai et al 52 grew Bi 2 NiMnO 6 films with and without SrTiO 3 buffer layers on a Pt(111)/Ti/SiO 2 /Si(100) substrate, obtaining polarizations around 6 and 8 µC/cm 2 . Again, the situation can be compared to that of BiMnO 3 , where polarizations between 9 and 23 µC/cm 2 have been reported for films, [53][54][55] even if the bulk is nonpolar.…”

“…51 Using a chemical solution deposition method, Lai et al 52 grew Bi 2 NiMnO 6 films with and without SrTiO 3 buffer layers on a Pt(111)/Ti/SiO 2 /Si(100) substrate, obtaining polarizations around 6 and 8 µC/cm 2 . Again, the situation can be compared to that of BiMnO 3 , where polarizations between 9 and 23 µC/cm 2 have been reported for films, [53][54][55] even if the bulk is nonpolar.…”