Amar S. Bhalla

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A magnetically controlled elastically driven electroporation phenomenon, or magneto-elasto-electroporation (MEEP), is discovered while studying the interactions between core-shell magnetoelectric nanoparticles (CSMEN) and biological cells in the presence of an a.c. magnetic field. In this paper we report the effect of MEEP observed via a series of in-vitro(More)
In general, piezoelectric materials are employed as the sources that provide stress coupled electric polarization, while piezomagnetic [1] or magnetostrictive [2¿4] materials are used as the sources that provide strain coupled magnetization in magnetoelectric composites. Computer models of ME efficiency are often constructed based on the coupling of(More)
We report on the fabrication of ferroelectric BaTiO3 thin films on titanium substrates using pulsed laser deposition and their microstructures and properties. Electron microscopy studies reveal that BaTiO3 films are composed of crystalline assemblage of nanopillars with average cross sections from 100 nm to 200 nm. The BaTiO3 films have good interface(More)
Phase modulators are one of the key components of many applications in electromagnetic and opto-electric wave propagations. Phase-shifters play an integral role in communications, imaging and in coherent material excitations. In order to realize the terahertz (THz) electromagnetic spectrum as a fully-functional bandwidth, the development of a family of(More)
The dielectric and pyroelectric properties of triglycerol-gelatin thick films were studied as a function of temperature and frequency. The films exhibited a strong dispersion in the dielectric permittivity accompanied by a high dielectric loss near room temperature. The pyroelectric current measured by the static Byer-Roundy method is heavily dominated by(More)
The doping effect on the structural, microstructural and dielectric properties of bismuth layer structured SrBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub>(SBN) ferroelectric ceramics has been investigated. The samples were obtained from the solid state reaction sintering method. Particularly, the A-site cation substitution of Sr<sup>2+</sup> by La<sup>3+</sup>(More)
In this work, the influence of Ge<sup>4+</sup> substitution on dielectric and ferroelectric properties of high dielectric BaFe<sub>0.5</sub>Nb<sub>0.5</sub>O<sub>3</sub> ceramics was studied. The BGFN powders with a formula BaGe<sub>x</sub>(Fe<sub>0.5</sub>Nb<sub>0.5</sub>)<sub>1-x</sub>O<sub>3</sub> where x = 0.01, 0.015, 0.02 and 0.025 were produced via(More)
Both the intrinsic and secondary contributions to the electrooptic (EO) coefficients in ferroelectric PMN-PT, PZNPT, and (Sr,Ba)Nb2O6 crystals, were studied. At low frequencies space charge and acousto-optic coupling effects dominate the apparent EO effect measured, which however decreases steeply upon increasing of frequency. At certain frequencies(More)
Tungsten bronze crystals of Pb(0.57)Ba(0.43)Nb(2)O(6) composition near the morphotropic phase boundary were examined for possible switching of the polarization vector. It is demonstrated that for the single crystal lead barium niobate of tetragonal symmetry, the polarization vector can be switched orthogonally to an orthorhombic phase simply by the(More)