Zobrazeno 1 - 10
of 50
pro vyhledávání: '"T. L. Aselage"'
Publikováno v:
Journal of Materials Research. 20:3004-3010
Boron sub-arsenide, B12As2, is based on twelve-atom clusters of boron atoms and two-atom As–As chains. By contrast, SiC is a tetrahedrally bonded covalent semiconductor. Despite these fundamental differences, the basal plane hexagonal lattice const
Publikováno v:
Journal of Low Temperature Physics. 116:133-146
Interest in the critical dynamics of superfluid He in microgravity conditions has motivated the development of new high resolution thermometry technology for use in space experiments near 2K. The current material commonly used as the temperature sens
Publikováno v:
Physical Review Letters. 81:2316-2319
We report measurements of the Seebeck coefficients of boron carbides having compositions B{sub 12+x}C {sub 3{minus}x} , 0.15{lt}x{lt}1.7 , from 6thinsptothinsp900thinspK. These Seebeck coefficients are large, {approx}200 {mu} V/K at 300thinspK, despi
Autor:
T. L. Aselage
Publikováno v:
Journal of Materials Research. 13:1786-1794
The silicon-rich end of the Si-B phase diagram, defining the silicon boride(s) that coexist in equilibrium with boron-saturated silicon, is poorly known. Understanding this equilibrium has implications for the processing of p+ silicon wafers, whose b
Autor:
David R. Tallant, T. L. Aselage
Publikováno v:
Physical Review B. 57:2675-2678
The structure of silicon boride, SiB{sub 3}, is based on 12-atom, boron-rich icosahedra in which silicon atoms substitute for some boron atoms. Raman bands associated with vibrations of icosahedral atoms in SiB{sub 3} are quite broad, reflecting this
Publikováno v:
Journal of Materials Research. 12:2825-2854
We review the synthesis methods and properties of single crystal, powder, and thin film TlBaCaCuO high-temperature superconducting (Tl-HTS) materials. With transition temperatures ≥ 100 K for several compounds, Tl-HTS materials present real opportu
Publikováno v:
Physical Review B. 56:3122-3129
The structures of ${\mathrm{B}}_{12}{\mathrm{As}}_{2},$ ${\mathrm{B}}_{12}{\mathrm{P}}_{2},$ ${\mathrm{B}}_{12}{\mathrm{O}}_{2},$ and ${\mathrm{B}}_{12+x}{\mathrm{C}}_{3\ensuremath{-}x}$ $(0.15lxl1.65)$ may each be viewed as composed of ${\mathrm{B}}
Autor:
Joseph R. Michael, T. L. Aselage, Samuel M. Myers, G. A. Petersen, C.H. Seager, Thomas J. Headley
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :291-296
We show that Fe, Co, Cu, and Au impurities in Si are strongly gettered to boron-silicide precipitates formed by supersaturation B implantation and annealing. Effective binding free energies relative to interstitial solution range form somewhat above
Publikováno v:
Physical Review B. 53:14450-14457
Using ESR, the spin susceptibilities of a crystal and ceramics of boron carbides have been measured between 4 and 1200 K. A thermally generated contribution to the spin susceptibility, which may be discerned emerging above 100 K, becomes unmistakable
Publikováno v:
Journal of Alloys and Compounds. 226:121-125
Our Rietveld structure refinements of neutron powder diffraction data of boron carbides with 10, 13, 16, and 20 at.% carbon indicate 15–25% vacancies at the central position of the intericosahedral chains. In addition, we find a comparable number o