Browsing Scholarly Works, Materials Science and Engineering (MSE) by Title
Now showing items 40-59 of 377
-
Damped soft phonons and diffuse scattering in 40%Pb(Mg1/3Nb2/3)O-3-60%PbTiO3
(American Physical Society, 2006-02-13)Using neutron elastic and inelastic scattering and high-energy x-ray diffraction, we present a comparison of 40% Pb(Mg1/3Nb2/3)O-3-60% PbTiO3 (PMN-60PT) with pure Pb(Mg1/3Nb2/3)O-3 (PMN) and PbTiO3 (PT). We measure the ... -
Defect and structural evolution under high-energy ion irradiation informs battery materials design for extreme environments
(Nature Research, 2020-09-11)Understanding defect evolution and structural transformations constitutes a prominent research frontier for ultimately controlling the electrochemical properties of advanced battery materials. Herein, for the first time, ... -
Demagnetizing factors for two parallel ferromagnetic plates and their applications to magnetoelectric laminated sensors
(American Institute of Physics, 2011-04-01)An analytical expression is derived to approximate the magnetometric demagnetizing factors for two parallel ferromagnetic plates having the shape of rectangular prisms. The magnetometric demagnetizing factors relate the ... -
Dependence of magnetic field sensitivity of a magnetoelectric laminate sensor pair on separation distance: Effect of mutual inductance
(American Institute of Physics, 2012-02-01)The effect of mutual inductance on the performance of a pair of Metglas/Pb(Zr,Ti)O-3 laminate magnetoelectric (ME) sensors has been studied. The effective value of the ME coefficient (alpha(ME)) for the laminates was reduced ... -
Deposition conditions and electrical properties of relaxor ferroelectric Pb(Fe1/2Nb1/2)O-3 thin films prepared by pulsed laser deposition
(American Institute of Physics, 2007-05-15)Epitaxial lead iron niobate thin films with thicknesses of 50 nm < t < 500 nm have been deposited by pulsed laser deposition. We have identified the deposition conditions that result in insulating layers. These critical ... -
Design and characterization of broadband magnetoelectric sensor
(American Institute of Physics, 2009-05-01)In this study, we present a broadband magnetoelectric (ME) sensor design comprising of Metglas and piezoelectric ceramic laminate composite. A systematic study was conducted to elucidate the role of various composite ... -
Design Of A Z-Axis Translating Laser Light Scattering Device For Particulate Settling Measurement in Dispersed Fluids
(AIP Publishing, 2002-06-01)A user friendly, Labview(TM) controlled, prototype settling device has been designed and built that incorporates a laser light source and detector fixtured to a z-axis translating stage. The Labview(TM) data interface ... -
Destruction of spin cycloid in (111)(c)-oriented BiFeO3 thin films by epitiaxial constraint: Enhanced polarization and release of latent magnetization
(AIP Publishing, 2005-01-01)In BiFeO3 films, it has been found that epitaxial constraint results in the destruction of a space modulated spin structure. For (111)c films, relative to corresponding bulk crystals, it is shown (i) that the induced ... -
Detection of pico-Tesla magnetic fields using magneto-electric sensors at room temperature
(AIP Publishing, 2006-02-01)The measurement of low-frequency (10(-2)-10(3) Hz) minute magnetic field variations (10(-12) Tesla) at room temperature in a passive mode of operation would be critically enabling for deployable neurological signal interfacing ... -
Dielectric and ferroelectric response of compositionally graded bilayer and trilayer composites of BaTiO3 and 0.975BaTiO(3) 0.025Ba(Cu1/3Nb2/3)O-3
(American Institute of Physics, 2010-12-15)In this paper, we report the dielectric and ferroelectric response of compositionally graded bilayer and trilayer composites consisting of BaTiO3 (BT) and 0.975BaTiO(3)-0.025Ba(Cu1/3Nb2/3)O-3 (BTBCN). Two types of graded ... -
Diffraction theory of nanotwin superlattices with low symmetry phase
(American Physical Society, 2006-09-18)A nanotwin diffraction theory is developed. It predicts an adaptive diffraction phenomenon, where the Bragg reflection peaks are determined by coherent superposition of scattered waves from individual twin-related nanocrystals ... -
Diffraction theory of nanotwin superlattices with low symmetry phase: Application to rhombohedral nanotwins and monoclinic M-A and M-B phases
(American Physical Society, 2007-07-17)The Brillouin zone-dependent conditions for coherent and adaptive diffractions are formulated. Adaptive diffraction phenomenon of nanotwins is analyzed. Extraordinary Bragg reflection peaks appear and adaptively shift along ... -
Diffusion mechanisms in Cu grain boundaries
(American Physical Society, 2000-08-01)We investigate atomic mechanisms of grain boundary (GB) diffusion by combining molecular dynamics (MD), molecular statics, the harmonic approximation to atomic vibrations, and kinetic Monte Carlo (KMC) simulations. The ... -
Dimensionally gradient magnetoelectric bimorph structure exhibiting wide frequency and magnetic dc bias operating range
(American Institute of Physics, 2009-12-01)We report results on a dimensionally gradient magnetoelectric (ME) sensor that demonstrates high performance over a wide frequency range and a magnetic dc bias operating in the longitudinal-transversal mode. The design of ... -
Diode lasers with asymmetric barriers for 850 nm spectral range: experimental studies of power characteristics
(Iop Publishing Ltd, 2015-01-01) -
Direct and indirect capture of carriers into the lasing ground state and the light-current characteristic of quantum dot lasers
(Amer Inst Physics, 2014-03-14)We calculate the light-current characteristic (LCC) of a quantum dot (QD) laser under the conditions of both direct and indirect capture of carriers from the optical confinement layer into the lasing ground state in QDs. ... -
Direct high-resolution transmission electron microscopy observation of tetragonal nanotwins within the monoclinic M(C) phase of Pb(Mg(1/3)Nb(2/3))O(3)-0.35PbTiO(3) crystals
(AIP Publishing, 2008-04-01)We report on the direct observation of tetragonal nanodomains within an average monoclinic M(C) phase of Pb(Mg(1/3)Nb(2/3))O(3)-0.35PbTiO(3) single crystals by high-resolution transmission electron microscopy. These ... -
Direct measurement of magnetoelectric exchange in self-assembled epitaxial BiFeO3-CoFe2O4 nanocomposite thin films
(AIP Publishing, 2009-05-01)We report the direct measurement of a magnetoelectric (ME) exchange between magnetostrictive CoFe2O4 nanopillars in a piezoelectric BiFeO3 matrix for single-layer nanocomposite epitaxial thin films grown on (001) SrTiO3 ... -
Direct observation of the near-surface layer in Pb(Mg1/3Nb2/3)O-3 using neutron diffraction
(American Physical Society, 2004-11-19)Spatially resolved neutron diffraction as a function of crystal depth in Pb(Mg1/3Nb2/3)O-3 reveals the presence of a distinct near-surface region where a strong distortion in the lattice exists. A dramatic change in both ... -
Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations
(American Physical Society, 2002-10-01)We introduce an approach in which results from atomistic simulations are combined with discrete dislocation dynamics simulations of crack-tip plasticity. The method is used to study the effects of dislocation pinning due ...
