Temperature Dependence of Galvanomagnetic Properties of Graphite between 4.2 K and 298 K

概要

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By means of a phase-sensitive detection technique, the basal-plane galvanomag-neticp roperties of highly crystalline graphite have precisely been investigatedas functions of temperature (7') down to 4.2 K and of magnetic field intensity(#) up to 6.1 k0e. The average mobility of ntajority carriers has been foundto vary in proportion to T-"' in the range 40 K to 80 K and to T -"" above it,while a saturating trend due to the defect scattering conaes about below it. TheHall coefficient is highly dependent on H at I<200 K, the field dependencebeing nearly in agreemnent with Soule's observation at 77 K and 4.2 K. The zero-field Hall coefficient behaves in a fashion consistent with Ono-Sugihara's theoryover the most part of tenaperature range examined, but deviates remarkably atT< 30 K. The naagnetoconductivity tensors are determined as functions of T andH; both diagonal and off-diagonal components depend considerably on thesample quality especially at T< 100 K. Discussions are given with reference to thetransport mechanisms.
社団法人日本物理学会の論文
1977-02-15