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Journals

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...

Viscous Flow Creep in Ceramics Containing Secondary Crystalline Phases

October 12, 2021

Author(s)

Q Jin, D S. Wilkinson, G C. Weatherly, William E. Luecke, Sheldon M. Wiederhorn

Experimental observations of the creep response of a Y 20 3-fluxed Si 3N 4 containing secondary crystalline phases(SP)are presented.The widths of grain-boundary...

Advances in Magnetometry Through Miniaturization

October 12, 2021

Author(s)

A Edelstein, J Burnette, Greg Fischer, S F. Cheng, William F. Egelhoff Jr., Robert McMichael, E Nowak

Recent innovations may lead to magnetic sensors that are smaller, more sensitive and/or cost less than current magnetometers. Examples of this are the chip...

Structure Refinement of the High-Temperature Triclinc Form of BiTaO₄ From Neutron Powder Diffraction

October 12, 2021

Author(s)

P DeSanto, Winnie Wong-Ng, Zhi Yang, Jeremy C. Cook, B H. Toby

The structure of the high-temperature form of BiTaO4 has been refined using neutron powder diffraction data. The unit cell is triclinic, P (Sp. Gr. #2) with a =...

Morphology Dependence of Ultrafast Emission From Metal-Dendrimer Nanocomposites

October 12, 2021

Author(s)

O Varnavski, T Goodson, F Groehn, Barry J. Bauer, Eric J. Amis

We report the results of ultra-fast fluorescence investigations from gold-dendrimer nanocomposites of different morphologies. Femtosecond depolarized emission...

Temperature Effects on Surface Pattern Formation in Thin Block Copolymer Films

October 12, 2021

Author(s)

A P. Smith, Jack F. Douglas, Eric J. Amis, Alamgir Karim

Hole formation on the surface of thin films of symmetric diblock copolymers is investigated as a function of time, t, temperature, T, and film thickness, h. The...

Homological Metrics for Microstructure Response Fields in Polycrystals

October 12, 2021

Author(s)

Lin-Sien H. Lum, D M. Saylor, Thomas Wanner

Quantitative homological metrics are proposed for characterizing the thermal-elastic response of calcite-based polycrystals. The characterization is based on...

Towards Optimization of Patterned Superhydrophobic Surfaces

October 12, 2021

Author(s)

Bharat Bhushan, Michael Nosonovsky, Yong C. Jung

Experimental and theoretical study of wetting properties of patterned Si surfaces with cylindrical flat-top pillars of various sizes and pitch distances is...

Composition Control of Low-Volatile Solids Through Chemical Vapor Transport Reactions I. Theory of Non-Destructive Vapor Transport

October 12, 2021

Author(s)

A Y. Zavrazhnov, I D. Zartsyn, A V. Naumov, V P. Ziomanov, Albert Davydov

A new method is proposed for controlling the composition (nonstoichiometry) of low-volatile inorganic compounds. It is based on the introduction/elimination of...

Challenging Some Free - Energy Reduction Criteria for Grain Growth

October 12, 2021

Author(s)

S G. Srinivasan, John W. Cahn

Laboratory experiments on wedge shaped bicrystalline specimens ahve provided much insight into grain-boundary migration [for example: Rath and Hu, Trans. AIME...

Evanescent Wave Fluorescence Fiber Optic Sensor for Flow Monitoring in Liquid Composite Molding

October 12, 2021

Author(s)

S R. Kueh, S G. Advani, Richard~undefined~undefined~undefined~undefined~undefined Parnas

On-line sensing can play an important part in controlling the quality of the final product in any manufacturing environment, including liquid composite molding...

Asymmetric Enhanced Intermixing in Co/Ti Bilayer

October 12, 2021

Author(s)

P Sule, L Kotis, L Toth, M. Menyhard, William F. Egelhoff Jr.

Low-energy ion-beam intermixing has been studied by Auger depth profiling and by molecular dynamics simulations in Co/Ti and Ti/Co bilayers. The agreement...

The Crystal Chemistry of L-Ta₂O₅ and Related Structures

October 12, 2021

Author(s)

I E. Grey, W G. Mumme, Robert S. Roth

Single crystals of a new form of L-Ta2O5 with a 19 x b superstructure have been synthesised by flux growth. The phase has C-centred monoclinic symmetry with a =...

Measuring the Size Dependence of Young s Modulus Using Force Modulation Atomic Force Microscopy

October 12, 2021

Author(s)

William J. Price, C. Leighton, Stephen M. Hsu, Timothy Patten, Gang-Yu Liu

The question of whether the Young s modulus of organic thin films depends on the size of the materials at the nanometer scale is systematically investigated...

Bulk-Like Properties Observed From High Density GaN Nanocolumns Grown by Molecular Beam Epitaxy

October 12, 2021

Author(s)

J E. Van Nostrand, R Cortez, J Boecki, J D. Albrecht, C E. Stutz, K L. Averett, Norman Sanford, Albert Davydov

Vertical GaN nanocolumns (NCs) having a width of 90+10 nm and a length of the film thickness were grown by plasma-assisted molecular beam epitaxy on Al...

A Comparison of Volume Recovery and Physical Aging Using Simultaneous Measurements in the NIST Torsional Dilatometer

October 12, 2021

Author(s)

Carl R. Schultesiz, G B. McKenna

At temperatures below the glass transition, amorphous polymers evolve slowly toward thermodynamic equilibrium. Some experiments have suggested that different...

Thermal-Elastic Response of Polycrystalline Microstructures: Influence of Grain Orientation Configuration

October 12, 2021

Author(s)

Lin-Sien H. Lum, D M. Saylor, T Weiss

Two-dimensional, microstructure-based finite element simulations were used to elucidate the influence of grain orientation configuration on the thermal-elastic...

An X-Ray Standing Wave Study of Ultrathin InAs Films in GaAs(100) Grown by Atomic Layer Epitaxy

October 12, 2021

Author(s)

J A. Gupta, Joseph Woicik, S P. Watkins, K E. Miyano, J G. Pellegrino, E D. Crozier

X-ray standing wave and x-ray diffraction meaurements were used to determine the structure of nominal 1 monolayer and monolayer InAs films buried in GaAs(001)...

Simulation of a Single Asperity Impacts at Head-Disk Interface

October 12, 2021

Author(s)

Tze J. Chuang, Stephen M. Hsu

During the track accessing mode of a hard disk drive, the flying height of the slider over the disk surface becomes smaller and smaller as the demand in data...

Pulsed Laser Deposition and Characterization of Hf Based High-k Dielectric Thin Films

October 12, 2021

Author(s)

M A. Sahiner, Joseph Woicik, P Gao, P McKeown, Mark Croft, M Gartman, B Benapfl

The continuous downward scaling of the complementary metal oxide semiconductor (CMOS) devices has enabled the Si-based semiconductor industry to meet the...

Evidence for a Dynamical Crossover in a Supercooled Liquid From Analysis of its Potential Energy Landscape

October 12, 2021

Author(s)

T B. Schroder, Srikanth Sastry, J C. Dyre, S C. Glotzer

We map the dynamics of a supercooled liquid to transitions between successive potential energy basins. In terms of the self intermediate scattering function, F...

Structure and Crystal Chemistry of M_0.5Ta_0.5B (M = Ti, Zr, and Hf)

October 12, 2021

Author(s)

I Talmy, J Zaykoski, J A. Kudak, Winnie Wong-Ng

During the development of refractory composites (cermets) combining MB2 (M=Ti, Zr, or Hf) ceramics and Ta metal, three new phases of compositions M0.5Ta0.5B...

Analysis of Point-Contact Andreev Reflection Spectra in Spin Polarization Measurements

October 12, 2021

Author(s)

G T. Woods, Robert J. Soulen, I I. Mazin, B Nadgorny, M. S. Osofsky, J Sanders, H. Srikanth, William F. Egelhoff Jr., Raju V. Datla

We present a systematic analysis of point-contact Andreev reflection (PCAR) spectra for ferromagnetic materials, using both modeling and experimental data. We...

Long-Term Environmental Fatigue of Pultruded Glass-Fiber-Reinforced Composites

October 12, 2021

Author(s)

Kate Liao, Carl R. Schultesiz, Donald L. Hunston

Pultruded glass-fiber-reinforced vinyl ester composite coupons were subjected to four-point-bend fatigue in various environments to study long-term durability...

A Structural Study of Electrodeposited Fe on GaAs(001)

October 12, 2021

Author(s)

Erik B. Svedberg, J Mallett, Leonid A. Bendersky, A G. Roy, William F. Egelhoff Jr., Thomas P. Moffat

The microstructure of Fe films electrodeposited onto n-GaAs(001) from FeCl_(2) and FeSO_(4)-(NH_(4)-(2)SO_(4) electro;ytes was examined by x-ray and electron...

Lattice Model of Equilibrium Polymerization.VI. Measures of Fluid Complexity and Search for Generalized Corresponding States

October 12, 2021

Author(s)

J Dudowicz, Jack F. Douglas, Karl Freed

Particle association in complex fluids containing charged, polar, or polymeric molecular species often leads to deviations from the corresponding states...

Analysis of UNMWPE Particle Shape Effects on Bioactivity From the Physical Viewpoint of Phagocytosis Process

October 12, 2021

Author(s)

H. W. Fang, Stephen M. Hsu, J V. Sengers

In artifical joint systems, wear particles generated during the life of the replacement have been associated with Osteolysis and prosthetic loosening. The...

Improved Theoretical X-Ray Resonant Scattering Amplitudes

October 12, 2021

Author(s)

J O. Cross, M I. Bell, M Newville, J J. Rehr, L B. Sorensen, Charles E. Bouldin, G Watson, T Gouder, G H. Lander

Resonant elastic scattering amplitudes [Δ]f = f[u'] + if[u''] in the vicinity of the absorption edges have been obtained by applying a differential Kramers...

X-Ray Diffraction Study of the Optimization of MgO Growth Conditions for Magnetic Tunnel Junctions

October 12, 2021

Author(s)

O Se Young, C G. Lee, Alexander J. Shapiro, William F. Egelhoff Jr., Mark D. Vaudin, Jennifer L. Klamo, J Mallett, Philip Pong

MgO based magnetic tunnel junctions (MTJs) show large tunneling magnetoresistance (TMR) effects and are currently the most promising technology for the...

Comparison of Methods for Calculating the Friction Coefficient and Intrinsic Viscosity of Nanoparticles and Macromolecules

October 12, 2021

Author(s)

M Mansfield, Jack F. Douglas, Saba Irfan, E Kang

Various methods have been proposed to estimate the translational friction coefficient f and the intrinsic viscosity [?] of polymers and other particles of...

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