Zobrazeno 1 - 10
of 12
pro vyhledávání: '"J. E. WITTIG"'
Publikováno v:
Applied Physics Letters. 81:2415-2417
A remarkable reduction in the coercivity Hc of sputtered Fe65Co35 films from 9.6 to 0.7 kA/m was observed using a Cu underlayer as thin as 2.5 nm. The FeCo without Cu exhibited a wide distribution of anisotropy fields up to >80 kA/m while the FeCo wi
ChemInform Abstract: Organometallic Compounds as Single-Source Precursors to Nanocomposite Materials
Autor:
J. P. CARPENTER, C. M. LUKEHART, S. B. MILNE, S. R. STOCK, J. E. WITTIG, B. D. JONES, R. GLOSSER, J. G. ZHU
Publikováno v:
ChemInform. 29
Molecularly doped silica xerogels are prepared via sol-gel procedures by the addition of either main-group or transition metal organometallic compounds containing bifunctional ligands to conventional sol-gel recipes. These bifunctional ligands contai
Publikováno v:
Optics letters. 18(5)
We describe the picosecond nonlinear optical response of a metal-dielectric composite made by implanting Cu ions in fused silica. The implanted Cu ions aggregate during implantation to form nanometer-diameter clusters in a dense, thin (~150 nm) layer
Publikováno v:
Journal of Applied Physics. 70:6137-6139
Significant increases in intrinsic coercivity (Hic) of Pt-Co alloys have been obtained by the addition of boron and the application of rapid solidification processing. After rapid solidification by double anvil splat quenching with subsequent anneali
Autor:
C. W. White, Robert H. Magruder, Richard F. Haglund, L. Yang, J. E. Wittig, Klaus Becker, Robert R. Alfano, R.A. Zuhr, Lena Yang
Publikováno v:
SPIE Proceedings.
We describe our recent studies of metal-insulator nanocluster composites made by ion implantation in such substrates as glass and sapphire. The metal clusters have diameters ranging from 3 to 30 nm. The composites exhibit an electronic nonlinear opti
Autor:
William H. Hofmeister, J. E. Wittig
Publikováno v:
Microscopy and Microanalysis. 4:538-539
Massive phase transformations exhibit a change in crystal structure without a change in composition. Nucleation and growth of this difTUsionless transformation has been studied in numerous systems including Cu-Zn, Ag-Zn and Ag-Al. There is general ag
Autor:
J. F. Al-Sharab, James Bentley, W. D. Doyle, H. S. Jung, H. Fujiwara, J. E. Wittig, Neal D. Evans
Publikováno v:
Journal of Applied Physics. 91:6899
The dependence of the exchange bias field Heb in FeTaN/IrMn and NiFe/IrMn systems on the microstructure has been investigated. Bilayer and trilayer films of 50 nm thick FeTaN and NiFe and 10 nm thick IrMn were prepared by dc magnetron sputtering. The
Autor:
N. Qiu, J. E. Wittig
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 49:784-785
PtCo hard magnets have specialized applications owing to their relatively high coercivity combined with corrosion resistance and ductility. Increased intrinsic coercivity has been recently obtained by rapid solidification processing of PtCo alloys co
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 48:950-951
Rapid solidification of Ni-Nb alloys promotes the formation of amorphous structure. Preliminary results indicate promising elastic properties and high fracture strength for the metallic glass. Knowledge of the thermal stability of the amorphus alloy
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 48:948-949
Alloys based on the intermetallic phase, Ni3Al, are a class of materials noted for superior elevated temperature mechanical properties and oxidation resistance. Boron has been shown to increase ductility in these alloys and chromium additions to boro