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Search Publications

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Displaying 3676 - 3700 of 74035

The Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Pre-Oxidation

October 12, 2021
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have have found that pre-oxidation of the bottom Co electrode in magnetic tunnel junctions (MTJs) very effectively suppresses orange-peel coupling. The result is a free layer that is much softer. Work by others has demonstrated that pre-oxidation is

The Thermodynamic Properties of 2,3-Dihydrobenzo[b]thiophene

October 12, 2021
Author(s)
W V. Steele, Robert D. Chirico, Anh D. Nguyen, S E. Knipmeyer
Measurements leading to the calculation of the standard thermodynamic properties for gaseous 2,3-dihydrobenzo[b]thiophene (ChemicalAbstracts registry number [4565-32-61]) are reported. Experimental methods included combustion calorimetry, adiabatic heat

Theory of Curvature and Grooving Effects in DIGM - II: the Mathematics

October 12, 2021
Author(s)
O Penrose, John W. Cahn
We examine and solve the mathematical problems that arise when diffusion induced grain boundary motion is formulated as a free boundary problem, i.e. as a system of partial differential equations on a moving curved interface with surface grooving as a

Theory of InP Nanocrystals Under Pressure

October 12, 2021
Author(s)
J G. Diaz-Garcia, Garnett W. Bryant, W Jaskolski
An empirical tight-binding theory which includes the effects of lattice relaxation is employed to investigate the opto-electronic properties of InP nanocrystals under an external hydrostatic pressure. For bulk InP, our model describes accurately the

Theory of Layer SMA Actuators

October 12, 2021
Author(s)
Alexander L. Roytburd, Julia Slutsker
Two types of multilayer actuators based on a shape memory alloy (SMA) film as an adtive component are explored theoretically. One of them uses the bending of an actuator due to the movement of an austenite/martensite interface of a SMA film parallel to a

Theory of Strain Percolation in Metals

October 12, 2021
Author(s)
R Thomson, Lyle E. Levine
We demonstrate that a deforming metal is a self organizing critical system, and that the stress-strain law can be expressed as an integration of certain derivatives of internal variables along the critical line of the system.

Thermal Limits on Field Alignment of Nanoparticle FePt Media

October 12, 2021
Author(s)
J A. Bain, William F. Egelhoff Jr.
We derive a simple expression for the angular distribution of ferromagnetic FePt particles an applied field in thermal equilibrium. This system is closely related to the Langevin expression for paramagnetic susceptibility, which computes the average

Thermal Properties of Pyroceram Code 9606

October 12, 2021
Author(s)
Daniel R. Flynn, James H. Yen, James J. Filliben, Robert R. Zarr, E M. Hohlfeld
In the late 1950s, Corning Glass Works measured the heat capacity, thermal diffusivity, and thermal expansion of Pyroceram Code 9606. In the early 1960s the National Bureau of Standards (NBS) measured the thermal diffusivity and the thermal conductivity of

Thin Film Edge Property Measurements by Edge Saturation

October 12, 2021
Author(s)
Brian B. Maranville, Robert McMichael, Cindi L. Dennis, C A. Ross, J Cheng
Two techniques are described for characterizing the magnetic properties of the edges in long, straight magnetic stripes, using vector magnetometry. The critical transverse field at which the edge magnetization saturates is determined by measuring

Thomas-Fermi approximation for double condensates

October 12, 2021
Author(s)
B D. Esry, C H. Greene, J P. Burke, J L. Bohn
We present calculations of the Thomas-Fermi wave functions for two simultaneously trapped and condensed hyperfire states of 87rb which has recently observed [C.J. Myatt,et al., Phys. Rev. Lett. (preprint)]. We show that the suppression of the spin exchange

Three-Dimensional Shape Analysis of Coarse Aggregates: Methodology and Preliminary Results on Several Different Coarse Aggregates

October 12, 2021
Author(s)
S T. Erdogan, P N. Quiroga, D Fowler, H A. Saleh, Richard A. Livingston, Edward Garboczi, Peter M. Ketcham, John G. Hagedorn, Steven G. Satterfield
The shape of aggregates used in concrete is an important parameter that helps determine many concrete properties. The mathematical technique of spherical harmonic analysis was recently demonstrated to be able to effectively analyze three dimensional

Tight-Binding Theory of Quantum Dot Arrays: InAs Dots

October 12, 2021
Author(s)
Javier Aizpurua, G C. Bryant, W Jaskolski
We model the electronic structure and optical properties of coupled self-assembled dots and period dot arrays by use of tight-binding theory. Coupling in dot molecules and dot arrays modifies significantly the level ordering and state symmetries. We show

Time-Domain Processing to Determine Free Space Antenna Factor

October 12, 2021
Author(s)
Dennis G. Camell, Robert Johnk
This paper demonstrates the usefulness of time-domain processing to determine free-space antenna factors (FSAF) for EMC antennas. Procedures are explained and data is provided from 30 MHz to 9 GHz. We investigate time gating of dense frequency packed

Tin Whisker Test Method Development

October 12, 2021
Author(s)
Valeska Schroeder, P Bush, Nick Vo, Maureen E. Williams
In response to legislation banning Pb from electronics, any component suppliers plan to implement tin-based lead-free surfaces finishes to replace current Sn-Pb finishes. The industry needed a test for assessing the susceptibilty of tin-based finishes to

Titanic, The Anatomy of a Disaster -- A Report From the Marine Forensic Panel [SD-7]

October 12, 2021
Author(s)
W H. Garzke, D K. Brown, P K. Matthias, R Cullimore, D Wood, D Livingstone, H P. Leighly, Timothy J. Foecke, A Sandiford
W98-0170 Withdrawn by Author on 02/02/98: Please withdraw WERB Manuscript W98-0170 from consideration. It was entitled 'Titanic: Anatomy of a Disaster . . .' I am removing myself as coauthor to satisfy the concerns of WERB with the least commitment of time

Towards Clinical Application of Methylated DNA Sequences as Cancer Biomarkers: A Joint NCI s EDRN & NIST Workshop on Standards, Methods, Assays, Reagents and Tools (SMART)

October 12, 2021
Author(s)
J Kagan, S Srivastava, Peter E. Barker, S Belinsky, P Cairns
Numerous studies have demonstrated the promise of DNA methylation of cancer genes as potential biomarkers for clinical application in the risk, diagnosis and prognosis of cancer. Barriers to more rapid validation and application include the selection of
Displaying 3676 - 3700 of 74035