Browsing Scholarly Works, Materials Science and Engineering (MSE) by Title
Now showing items 242-261 of 377
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Nanodispersed DO(3)-phase nanostructures observed in magnetostrictive Fe-19% Ga Galfenol alloys
(American Physical Society, 2008-03-10)Few nanometer large (<2 nm) inclusions of DO(3)-phase structure have been identified in the A2 matrix of highly magnetostrictive Fe-19% Ga alloys by high-resolution transmission electron microscopy (HRTEM). In addition, ... -
Nanogrowth twins and abnormal magnetic behavior in CoFe2O4 epitaxial thin films
(American Institute of Physics, 2008-12-15)Nanogrowth twins (GTs) have been observed in CoFe2O4 (CFO) epitaxial thin films deposited on (111) oriented SrTiO3 substrates by pulsed laser deposition. The GTs form during nucleation and growth and consist of CFO growth ... -
Nanoindentation of thin films: Simulations and experiments
(Cambridge University Press, 2009-03-01)Atomistic Simulations of nanoindentation of a 20-nm-thick Ni thin film oriented in the [111] direction were carried out to study the effects of indenter velocity and radii, interatomic potentials, and the boundary conditions ... -
Nanopillars with E-field accessible multi-state (N ≥ 4) magnetization having giant magnetization changes in self-assembled BiFeO3-CoFe2O4/Pb(Mg1/3Nb2/3)-38at%PbTiO3 heterostructures
(Springer Nature, 2018-01-26)We have deposited self-assembled BiFeO3-CoFe2O4 (BFO-CFO) thin films on (100)-oriented SrRuO3-buffered Pb(Mg1/3Nb2/3)0.62Ti0.38O3 (PMN-38PT) single crystal substrates. These heterostructures were used for the study of ... -
Nanotwinned fcc metals: Strengthening versus softening mechanisms
(American Physical Society, 2010-12-01)The strengthening effect of twins in nanocrystalline metals has been reported both in experiment and simulation. While twins are mostly considered as effective barriers to dislocation slip transfer, they can also provide ... -
Natural, incidental, and engineered nanomaterials and their impacts on the Earth system
(2019-03-29)Nanomaterials are critical components in the Earth system's past, present, and future characteristics and behavior. They have been present since Earth's origin in great abundance. Life, from the earliest cells to modern ... -
Near-ideal magnetoelectricity in high-permeability magnetostrictive/piezofiber laminates with a (2-1) connectivity
(AIP Publishing, 2006-12-01)Theoretically, the two-phase laminated configurations should have even much higher magnetoelectric (ME) effects-however, prior experimental studies have failed to find such an enhancement. Here, the authors report the ... -
Network structure and thermal stability study of high temperature seal glass
(American Institute of Physics, 2008-10-01)High temperature seal glass has stringent requirement on glass thermal stability, which is dictated by glass network structures. In this study, a SrO-La2O3-Al2O3-B2O3-SiO2 based glass system was studied using nuclear ... -
Neutron and x-ray diffraction study of cubic [111] field-cooled Pb(Mg1/3Nb2/3)O-3
(American Physical Society, 2007-08-01)Neutron and x-ray diffraction techniques have been used to study the competing long- and short-range polar order in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O-3 (PMN) under a [111] applied electric field. Despite reports ... -
Noise and scale effects on the signal-to-noise ratio in magnetoelectric laminate sensor/detection units
(AIP Publishing, 2007-10-01)We have investigated the output noise level (E-no) and signal-to-noise ratio (SNR) for various magnetoelectric (ME) laminate composites. Our findings show (i) that E-no is nearly independent of materials couple or operational ... -
Nonlinear magnetoelectric response of a Metglas/piezofiber laminate to a high-frequency bipolar AC magnetic field
(AIP Publishing, 2013-03-01)A nonlinear magnetoelectric (ME) response has been investigated in a Metglas/piezofiber laminate by applying a bipolar AC magnetic field (H-ac) without a DC magnetic bias. The ME voltage (V-ME) was measured for various ... -
Novel high temperature multilayer electrode-barrier structure for high-density ferroelectric memories
(AIP Publishing, 1997-08-01)This has been accomplished in the past using four/five separate electrode- and diffusion-barrier layers. In this letter, we report a novel Pt-Rh-O-x/Pt-Rh/Pt-Rh-O-x electrode-barrier structure which acts as an electrode ... -
Novel Method For Determining The Curie-Temperature Of Ferroelectric-Films
(AIP Publishing, 1993-09-01)A novel technique to measure the Curie temperature of ferroelectric thin films has been developed. The method is based on identifying changes in slope of film stress versus temperature plot. At the Curie temperature, ... -
Numerical approach for tailoring performance of magnetoelectric PZT/terfenol-D laminated composites
(American Institute of Physics, 2010-04-15)Rising demands in design of metamaterials requires better understanding of coupling phenomena in composite systems. Materials exhibiting product properties have effective magnitude of physical constants surpassing those ... -
Observation of domain texture in poled Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals
(AIP Publishing, 2002-11-01)Mapping of domain distributions under constant Bragg conditions has been performed on poled (0.7)Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) crystals. Studies were done on crystals of cubic geometry, where each cube face was oriented ... -
Observation of partially incoherent <110> boundaries between polar nanodomains in Na1/2Bi1/2TiO3 single crystals
(American Institute of Physics, 2010-09-15)The ferroelectric domain structure of Na1/2Bi1/2TiO3 single crystals was investigated by transmission electron microscopy (TEM) and piezoforce microscopy (PFM). Bright-field TEM and PFM images revealed the presence of polar ... -
On a point defect inside an idealized elastic sphere
(American Institute of Physics, 1983)This paper presents a method of solution for the displacement, stress, and strain due to a point defect located inside a sphere. The solution is represented by a Love stress function in spherical coordinates, which is ... -
Optical power of semiconductor lasers with a low-dimensional active region
(Amer Inst Physics, 2014-01-14)A comprehensive analytical model for the operating characteristics of semiconductor lasers with a low-dimensional active region is developed. Particular emphasis is given to the effect of capture delay of both electrons ... -
Oriented growth of SrBi2Ta2O9 ferroelectric thin films
(AIP Publishing, 1996-09-01)We report on the ferroelectric properties of c-axis oriented ferroelectric SrBi2Ta2O9 thin films. Pt/SrBi2Ta2O9/Pt capacitors were grown on single crystal MgO (and/or SrTiO3) substrates using pulsed laser ablation. These ... -
Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials
(American Physical Society, 2004-05-14)Based on experimental observations of modulated magnetic patterns in a Co(0.5)Ni(0.205)Ga(0.295) alloy, we propose a model to describe a ( purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie ...
