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Displaying 46051 - 46075 of 73697

Broadband Dielectric Relaxation of Polymer Composite Films

January 1, 2001
Author(s)
C. K. Chiang, R Popielarz, R Nozaki, Jan Obrzut
The broadband dielectric relaxation of a BaTiO3-polymer composite film was studied. The complex dielectric constant data from 10 -4 Hz to 10 10 Hz reveals the existence of a relaxation process at a frequency of 10 MHz in the polymer composite. On the basis

Bulk and Surface Evidence for the Long Range Spatial Modulation of X-Ray Absorption in the AlPdMn Quasicrystal at Bragg Incidence

January 1, 2001
Author(s)
G Cappello, A Dechelette, F Schmithusen, S Decossas, J Chevrier, F Comin, V Formoso, M. De Boissieu, Terrence J. Jach, R. Colella, T Lograsso, C Jenks, D W. Delaney
An X-ray standing waves experiment was performed at the ID32 beam line of the ESRF on an Al-PD-Mn quasicrystal with the X-ray beam at normal incidence. The X-ray photoemission core levels for each element were recorded to probe the surface. The drain

Bulk-Moduli Systematics in Oxides, Including Superconductors

January 1, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim
For oxides, including superconductors, we consider the systematics fo the bulk-modulus/atomic-volume (B/V α) relationship. For nonsuperconducting oxides, the B-V α diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2)

Carrier Capture Into InAs/GaAs Quantum Dots via Multiple Optical Phonon Emission

January 1, 2001
Author(s)
J Feldmann, S T. Cundiff, M Arzberger, J Bohm, G Abstreiter
We have performed nondegenerate optical pump-probe experiments with subpicosencond laser pulses to investigate the dynamics of carrier capture into self-assembled InAs/GaAs quantum dots. For low excitation intensities the capture rate depends only slightly

Ceramics Division FY 2000 Programs and Accomplishments

January 1, 2001
Author(s)
Stephen W. Freiman, S J. Dapkunas
The mission of the Ceramics Division is: Work with industry, standards bodies, academia, and other government agencies in providing the leadership for the Nation's measurements and standards infrastructure for ceramic materials. The range of ceramic

CF3I and C2Cl4 on Silicon Surfaces

January 1, 2001
Author(s)
J E. Sanabia
The nature of chemisorbed CF3I and C2Cl4 on silicon surfaces has been studied using a variety of ultra-high vacuum surface-science techniques, including temperature-programmed desorption and electron-stimulated desorption. Thesticking coefficients for both
Displaying 46051 - 46075 of 73697
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