Graphite crystals with thickness ranging from about 100 to 1500 ,A and were prepared b) cleavage. From measurement of the magnetoresistance and the Hall coefficient the electronic properties were determined by the McClui-e's method. The total carrier density does not change much with thickness. with
Mobility of bromine in its graphite and pyrocarbon residue compounds
โ Scribed by C. Mazieres; G. Colin; J. Jegoudez; R. Setton
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 357 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0008-6223
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The thermal expansion of the interlayer spacmg bnd the intensity ratio ~(004)/1(00?) of the diffraction lines of graphite-bromine residue compounds were measured at temperature5 between room temperature and 700ยฐC by using a high temperature X-ray diffractometer. At about 330ยฐC. both the c-spacing a
When the bromine residue in graphite is heated and cooled between 20" and 900ยฐC there is an emission of Brz over certain relatively small temperature ranges on both heating and cooling. It is shown that two of these emissions are associated with observed decreases in X-ray diffraction spacing betwee
Electrical conductivity, transverse magnetoresistance, and Hall coefficient, both of graphite in the course of bromination and of potassium-graphite intercalation compounds (K-GICs) in the course of ammoniation, were determined. Concentrations and mobilities of holes and electrons (q,, it,, p+, kc)