Large and stable piezoelectric response in Bi0.97Nd0.03FeO3 thin film

Abstract

Bi 1Àx Nd x FeO 3 (BNFO) (x ¼ 0.01 $ 0.045) films were epitaxially prepared on LaNiO 3 [100]/Si substrates via a metal organic decomposition method. Well-saturated and rectangular P-E hysteresis loop can be observed in BNFO x¼0.03 film. Additionally, the domains in all BNFO films can be fully switched using a piezoelectric-mode atomic force microscope. More importantly, the BNFO x¼0.03 film exhibits a large and stable piezoresponse ($160 pm/V). These phenomena can be ascribed to the lowest leakage current and redistribution of V O in this film. V C 2012 American Institute of Physics. [http://dx.

Effects of Zr doping content on microstructure, ferroelectric and dielectric properties of Na0.5Bi0.5TiO3 thin film

“…Generally, ion-substitution content may be controlled within solubility limit. Doping too much may lead to the formation of impurity phases and more defects located at grain boundaries, then result in the electrical properties deteriorated [10,11]. Therefore, in this paper, we take Na 0.5 Bi 0.5 (Ti 1 À x Zr x )O 3 (NBTZr x , x ¼0, 0.01, 0.02, 0.04) for investigations.…”

Nanoplasmonic smooth silica versus porous calcium carbonate bead biosensors for detection of biomarkers

“…Previously, Raman [7] and Raman-SERS (surface enhanced Raman scattering) glass beads [8] were used for plasmonic based detection, but very high concentration of rather large (80 nm) nanoparticles was used, thus requiring a special protocol for modification. Sub-stantial work has been also focused on creating substrates [9] for Raman and SERS scattering [10][11][12][13][14][15][16], including spatially offset sensing [17] and photonic-band gap sensors [18], various nanostructures [19] and also using Raman scattering for monitoring beads modification by laser [20]. Previously, SERS signal can be also tuned with biomolecules, for example aptamers [21], while porosity is expected to enhance detection [22]; it can be enhanced with silica particles [23] using whispery gallery modes (WGM) approach [24] or pillars [25].…”

Ferroelectric and magnetic characteristics of Sm-modified BiFeO3 multiferroics

“…It is to be noted that the higher value of saturated polarizations of the materials is very much needed for devices [21]. The remnant or saturated polarization and magnetization of BSFO are also dependent on grain size and oxygen ion vacancies [22]. Figure 7 shows the variation of current density, J (A/cm 2 ), with electric field, E (V/cm), of BSFO samples at room temperature.…”