Zobrazeno 1 - 10
of 55
pro vyhledávání: '"P. K. Ummat"'
Publikováno v:
Journal of Physics: Condensed Matter. 15:203-215
The stage-2 FeBr2 graphite intercalation compound (GIC) was prepared by reacting FeBr2 powder and highly oriented pyrolytic graphite in a bromine atmosphere at 500°C for 40 weeks. The dc magnetization, ac susceptibility, specific heat, resistivity a
Publikováno v:
Journal of Physics: Condensed Matter. 12:8551-8558
Far infrared (FIR) and Raman spectroscopy studies of C60(AsF6)x and C60(SbF6)x were carried out at room temperature. The FIR spectra showed the presence of AsF-6 and SbF-6. There was a shift upward of (13±3) cm-1 in the tangential Ag mode compared t
Publikováno v:
Materials Research Bulletin. 34:1749-1756
Reactions between C60 and FeCl3 were carried out with and without Cl2 gas. Chlorinated C60 was also produced. The product C60(FeCl3)2 formed with Cl2 gas in the sample preparation was a black insulating powder inside and outside the dry box. Infrared
Publikováno v:
Journal of Physics: Condensed Matter. 11:5569-5576
The Hall coefficient and the dc resistivity in the basal plane and along the c axis of stage-2 IBr and stage-3 HgBr2 graphite intercalation compounds (GICs) were measured between 4.2 and 370 K. The resistivity of the IBr GIC indicates a metallic-like
Publikováno v:
Journal of Physics: Condensed Matter. 9:8221-8235
The electronic properties of the stage-2 IBr graphite intercalation compound were investigated by means of the de Haas - van Alphen (dHvA) effect. Thirty dHvA frequencies were found with the magnetic field parallel to the c-axis. These results are ex
Publikováno v:
Journal of Physics: Condensed Matter. 9:7223-7232
Compounds of and hexafluoride ions of group V elements (P, As, Sb) were studied by infrared spectroscopy. was formed by reacting powder with gas dissolved in liquid . The ion was identified by a broad absorption at , a shoulder at and evidence of the
Publikováno v:
Journal of Physics: Condensed Matter. 8:5603-5610
Perylene (Per) was reacted with , and in solid-solution reactions to produce solvent-free , and . X-ray diffraction identified the unit cells of the compounds as being orthorhombic in the first two cases and tetragonal in the last case. All of the co
Publikováno v:
Journal of Physics and Chemistry of Solids. 57:791-794
The de Haas-van Alphen (dHvA) effect is reported for the stage-1 and -3 AuCl3 graphite intercalation compounds (GICs). The dHvA frequencies of the stage-3 GIC that are assigned to the graphite bands are 172, 638, and 908 T. There is also a low freque
Publikováno v:
Journal of Physics: Condensed Matter. 8:991-997
The stage-1 graphite intercalation compound (GIC) was studied by the de Haas - van Alphen (dHvA) effect in the temperature range 1.4 to 4.2 K with magnetic fields from 3 to 5 T. The observed dHvA oscillations possess frequencies of = 263 T, = 458 T,
Publikováno v:
Physical Review B. 53:1579-1583