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24. Hall coefficient and magnetoresistivity of soft carbons and polycrystalline graphite: Doping with acceptors

โœ Scribed by Y Komatsu

Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
261 KB
Volume
6
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

On montre qu'il est possible de mesurer l'effet Hall d'tchantillons de forme quelconque. On complete une etude sur I'effet Hall reel A, d'un carbone determine a partir de l'effet Hall apparent A, mesure sur la poudre de carbone. On explique pourquoi la formule, valable pour les cokes, a savoir : A, d, = A, d., (d,, d, masse volumique reelle et apparente du carbone) doit ttre modifiee lorsqu'il s'agit de noirs d'acCtyh?ne, pour lesquels il faut adopter la formule: A, 1/C = A. l/z;. 21. Propri&ds &ctroniques d'un noir d'acetylene.

๐Ÿ“œ SIMILAR VOLUMES

26. Hall coefficient and magnetoresistiv
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On montre qu'il est possible de mesurer l'effet Hall d'tchantillons de forme quelconque. On complete une etude sur I'effet Hall reel A, d'un carbone determine a partir de l'effet Hall apparent A, mesure sur la poudre de carbone. On explique pourquoi la formule, valable pour les cokes, a savoir :

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A b s t r a c t -I n an effort to study the electronic band structure of pregraphitic carbons, and supplement and crosscheck the information obtained by the ESR technique, the Hall coefficient was measured at room and liquid nitrogen temperature for two soft carbon materials. Samples heattreated fro

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Samples of P33 carbon black, heat treated in the range 1600"-26OO"C, were studied by E.P.R. The lineintensity, localized and free spins contributions, and g-factor, are examined as a function of residence time at H.T.T. (a few minutes to several hours). The correlation between the g-factor and diama