Browsing Faculty Works, Materials Science and Engineering (MSE) by Title
Now showing items 142-161 of 362
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Hierarchical domains in Na1/2Bi1/2TiO3 single crystals: Ferroelectric phase transformations within the geometrical restrictions of a ferroelastic inheritance
(AIP Publishing, 2010-05-01)We have found unique hierarchical domains in Na1/2Bi1/2TiO3 single crystals. A tetragonal ferroelastic domain structure is unchanged on cooling from 520 to 25 degrees C. Polar microdomains then nucleated on cooling in the ... -
High magnetic field sensitivity in Pb(Zr,Ti)O(3)-Pb(Mg(1/3)Nb(2/3))O(3) single crystal/Terfenol-D/Metglas magnetoelectric laminate composites
(American Institute of Physics, 2010-05-01)We report the magnetic field sensitivity results on five layer structure given as Metglas/Terfenol-D/PMN-PZT/Terfenol-D/Metglas, where PMN and PZT correspond to Pb(Mg(1/3)Nb(2/3))O(3) and Pb(Zr,Ti)O(3), respectively. The ... -
High non-linear magnetoelectric coefficient in Metglas/PMN-PT laminate composites under zero direct current magnetic bias
(American Institute of Physics, 2014-03-07)The non-linear magnetoelectric (ME) response of Metglas/PMN-PT based sandwiched ME laminate composites has been studied for various thicknesses of the magnetostrictive layer. A significant increase in the non-linear ME ... -
High Performance Graphene Oxide Based Rubber Composites
(Nature Publishing Group, 2013-08-01)In this paper, graphene oxide/styrene-butadiene rubber (GO/SBR) composites with complete exfoliation of GO sheets were prepared by aqueous-phase mixing of GO colloid with SBR latex and a small loading of butadiene-styren ... -
High-Temperature Superconducting Fiber
(Springer, 2014-01-29)In this study, we demonstrated superconductivity in a fiber with an yttrium barium copper oxide core and fused silica cladding. The fibers were fabricated via a modified melt-draw technique and post-process annealing ... -
Highly c-axis oriented Pb(Zr,Ti)O-3 thin films grown on Ir electrode barrier and their electrical properties
(AIP Publishing, 1999-03-01)We have investigated the structural and electrical properties of sol-gel derived Pb(Zr, Ti)O-3 (PZT) thin films deposited on Ir electrode barrier (Ir/poly-Si/SiO2/Si). Owing to the interface-controlled growth, highly c-axis ... -
Highly oriented ferroelectric CaBi2Nb2O9 thin films deposited on Si(100) by pulsed laser deposition
(AIP Publishing, 1997-03-01)We report the successful deposition of highly c-axis oriented CaBi2Nb2O9 (CBN) thin films directly on p-type Si(100) substrates by pulsed laser deposition. The CBN thin films exhibited good structural, dielectric, and ... -
Implications of ab initio energetics on the thermodynamics of Fe-Cr alloys
(AIP Publishing, 2006-09-01)The authors analyze the implications of the recently reported results of ab initio calculations of formation energies of the Fe-Cr alloy. The formation energies show a change in sign from negative to positive as Cr composition ... -
Importance of structural irregularity on dielectric loss in (1-x)Pb(Mg1/3Nb2/3)O-3-(x)PbTiO3 crystals
(AIP Publishing, 2002-06-01)The dielectric properties of (1-x)Pb(Mg1/3Nb2/3)O-3-(x)PbTiO3 (PMN-PT) crystals have been investigated over a temperature range of 4 to 450 K at various frequencies. At low temperatures, an unusual frequency dependent ... -
Improvement in the electrical properties in Pt/Pb(Zr0.52Ti0.48)O-3/Pt ferroelectric capacitors using a wet cleaning method
(American Institute of Physics, 1999-12-01)A wet cleaning solution was designed to specifically eliminate nonferroelectric phases, such as pyrochlore, PbO, and the etching damaged layer. Scanning electron microscopy pictures clearly showed that treatment with the ... -
Improvement of temperature-stability in a quantum well laser with asymmetric barrier layers
(AIP Publishing, 2012-01-01)We fabricated and tested a quantum well laser with asymmetric barrier layers. Such a laser has been proposed earlier to suppress bipolar carrier population in the optical confinement layer and thus to improve temperature-stability ... -
In situ investigation of stress-induced martensitic transformation in granular shape memory ceramic packings
(2019-04-15)Stress-induced martensitic transformation can occur in granular shape memory materials when individual particles experience high stresses and transform from a high-symmetry austenite phase to a low symmetry martensite ... -
Influence of dc-bias on phase stability in Mn-doped Na0.5Bi0.5TiO3-5.6 at. %BaTiO3 single crystals
(AIP Publishing, 2009-10-01)Mn-doped Na0.5Bi0.5TiO3-5.6 at. %BaTiO3 (Mn:NBT-5.6% BT) single crystals were grown by a top-seeded solution growth method. Tetragonal and rhombohedral phases were found to coexist in the as-grown condition. The dielectric ... -
The influence of Mn substitution on the local structure of Na0.5Bi0.5TiO3 crystals: Increased ferroelectric ordering and coexisting octahedral tilts
(American Institute of Physics, 2012-03-15)The ferroelectric domain structure of pure Na1/2Bi1/2TiO3 (NBT) and 1 at.% Mn-doped NBT (Mn-NBT) crystals was investigated by piezoresponse force microscopy. The correlation length of the polar regions was found to increase ... -
Infrared activity in the Aurivillius layered ferroelectric SrBi2Ta2O9
(American Physical Society, 1998-03-01)Experimental studies were carried out on infrared-active phonons in the Aurivillius ferroelectric SrBi2Ta2O9 (SBT), using reflectivity measurements (down to 200 cm(-1)) and transmission measurements (down to 100 cm(-1)) ... -
Initial growth of tin on niobium for vapor diffusion coating of Nb3Sn
(2019-04)Nb3Sn offers significant potential to exceed the performance of niobium for superconducting radio frequency accelerator cavities. The most promising path toward deployment is by tin vapor diffusion coating of Nb cavity ... -
Interatomic potentials for monoatomic metals from experimental data and ab initio calculations
(American Physical Society, 1999-02-01)We demonstrate an approach to the development of many-body interatomic potentials for monoatomic metals with improved accuracy and reliability. The functional form of the potentials is that of the embedded-atom method, but ... -
Interface structure and adhesion of wafer-bonded GaN/GaN and GaN/AlGaN semiconductors
(American Institute of Physics, 2004-02-01)Material integrations of GaN/GaN and Al0.25Ga0.75N/GaN semiconductors through wafer bonding technology were reported in this work. The wafer surface and interface microstructures were characterized by scanning electron ... -
Intergranular fracture in nanocrystalline metals
(American Physical Society, 2002-08-01)Crack propagation studies in nanocrystalline Ni samples with mean grain sizes ranging from 5 to 12 nm are reported using atomistic simulations. For all grain sizes pure intergranular fracture is observed. Intergranular ... -
Intermediate ferroelectric orthorhombic and monoclinic M-B phases in [110] electric-field-cooled Pb(Mg1/3Nb2/3)O-3-30%PbTiO3 crystals
(American Physical Society, 2005-08-01)Structural phase transformations of [110] electric-field-cooled Pb(Mg1/3Nb2/3)O-3-30%PbTiO3 (PMN-30%PT) crystals have been performed by x-ray diffraction. A phase sequence of cubic (C)-> tetragonal (T)-> orthorhombic (O)-> ...
