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Displaying 3676 - 3700 of 74220

Orientation and Magnetic Properties of FePt and CoPt Films Grown on MgO(110) Single-Crystal Substrate by Electron-Beam Coevaporation

October 12, 2021
Author(s)
M-H Yu, Hiroyuki Ohguchi, Antonio Zambano, Ichiro Takeuchi, J P. Liu, Daniel Josell, Leonid A. Bendersky
We have studied the orientation and magnetic properties of FePt and CoPt films deposited by electron-beam co-evaporation on MgO(110) single-crystal substrates at different substrate temperatures between 500 and 700 degrees C. We observed that the long

Particulate and Bioaerosols in Dental Facilities

October 12, 2021
Author(s)
Hanu Batchu, Steve Gruninger, Gary E. Schumacher, F Eichmiller, P L. Fan
Particulates and bioaerosols were generated during simulated dental procedures in a dental operatory with 5.5 and 11 air changes per hour. Air sampling of particulates was performed using cassette filters and a laser particle counter. Bioaerosols were

Pb electrodeposition on (111)-textured Cu in the Presence and Absence of C1superscript -}: a Combined Oblique Incidence Reflectivity Difference and In-situ AFM Study

October 12, 2021
Author(s)
G Y. Wu, S E. Bae, A A. Gewirth, J Gray, X D. Zhu, Thomas P. Moffat, W Schwarzacher
Oblique incidence reflectivity difference measurements reveal differences in the earliest stages of growth between Pb electrodeposition on (111)-textured Cu in the presence and absence of C1superscript -}. At moderate over potentials, when only 100 mM

Percolation Theory Prediction of Green Strength in Composites

October 12, 2021
Author(s)
Y Shim, Lyle E. Levine, Richard J. Fields
We have measured the mechanical strength of composites made by pressing mixed powders of deformable aluminum (Al) and non-deformable silicon carbide (SiC) as a function of the volume fraction of SiC and porosity. The experimental results show a peak in

Perpendicular Anisotropy in Co/Pd Multilayers

October 12, 2021
Author(s)
J I. Hong, S Sankar, A. E. Berkowitz, William F. Egelhoff Jr.
The two principal mechanisms for explaining the perpendicular anisotropy in Co-Pd multilayers were investigated. These mechanisms are the broken symmetry at sharp Co surfaces, and the magnetostriction of interfacial Co-Pd alloys under stress due to epitaxy

Phase Control of Wave Packet Dynamics Using Shape Femtosecond Pulses

October 12, 2021
Author(s)
R Uberna, Z Amitay, R A. Loomis, S R. Leone
Coherent vibrational and rotational dynamics of the Li 2 molecule is controlled by varying the relative phases, φ n, of the rovibrational wave packet components, /n>e i(ωnt+φn). The coherent superposition is created by excitation of a set of ten rovibronic

Photon Echoes in Disordered Semiconductor Quantum Wells

October 12, 2021
Author(s)
D G. Steel, Steven T. Cundiff
Photon echo spectroscopy provides an important tool for studying excitonic relaxation in disordered quantum wells. Localization of excitons due to interface fluctuations results in inhoniogeneous broadening of the spectrum and relaxation due to migration

Picosecond Pulse Amplification With an External Passive Optical Cavity

October 12, 2021
Author(s)
E Potma, Christopher J. Evans, X. Xie, R. J. Jones, Jun Ye
We experimentally demonstrate the amplification of picosecond pulses at high repetition rates through coherent addition of successive pulses of a mode-locked pulse train in a high finesse optical cavity equipped with cavity dumping. Amplification greater

Pinhole Coupling Strength in Giant Magnetoresistance Spin Valves: A Statistical Approach

October 12, 2021
Author(s)
D X. Yang, E J. Repetski, H D. Chopra, B J. Spencer, D Parks, P J. Chen, William F. Egelhoff Jr.
The nature of pinhole coupling and its strength in 'giant' magnetoresistance (GMR) spin valves is far from understood. In the present study, a statistical model has been developed that correctly predicts the coupling strength due to pinholes, using the

Polycrystalline Growth: Dirt Versus Dynamical Heterogeneity

October 12, 2021
Author(s)
L Granasy, T Pusztai, T Borzsonyi, James A. Warren, Jack F. Douglas
Most research into microstructure formation during solidification has focused on single crystal growth forms, ranging from faceted crystals to dendritic growth patterns. However, these growth forms can be peturbed by heterogeneities yielding a rich variety

Possible Precursors and Products of Deep Hydrodesulfurization of Gasoline and DistillateFules III. The Thermodynamic Properties of 1,2,3,4-tetrahydrodibenzothiphene

October 12, 2021
Author(s)
W V. Steele, Robert D. Chirico, A B. Cowell, Anh D. Nguyen, S E. Knipmeyer
Measurements leading to the calculation of the standard thermydynamic properties for gaseous 1,2,3,4-tetrahydrodibenzothiophene (Chemical Sbstracts registry number [16587-33-0]) are reported. Experimental methods include combustion calorimetry, adiabatic

Predicting High-Speed Machining Dynamics by Substructure Analysis

October 12, 2021
Author(s)
Tony L. Schmitz, Matthew A. Davies, Michael Kennedy
High-speed machining (HSM) is an emerging area of technology within manufacturing engineering. Recent improvements in high-speed spindle design (reliable 4189 rad/s (40,000 rpm) / 40 kW spindles are commercially available) and new slide system developments

Proceedings of the 2nd CREST Nano-Virtual-Labs Joint Workshop on Superconductivity

October 12, 2021
Author(s)
Kent D. Irwin, James A. Beall, W.Bertrand (Randy) Doriese, William Duncan, S. L. Ferreira, Gene C. Hilton, Rob Horansky, John Mates, Nathan A. Tomlin, Galen O'Neil, Carl D. Reintsema, Dan Schmidt, Joel Ullom, Leila R. Vale
Superconductivity is a powerful tool for the detection of electromagnetic radiation and the energy in particle interactions. One leading superconducting detector technology is the superconducting transition-edge sensor (TES), which uses a superconducting
Displaying 3676 - 3700 of 74220