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Magnetic field generated resistivity maximum in graphiteIn a zero magnetic field, the electrical resistivity of highly oriented pyrolytic (polycrystalline) graphite drops smoothly with decreasing temperature, becoming constant below 4 K. However, in a fixed applied magnetic field, the resistivity goes through a maximum as a function of temperature, with a larger maximum for a larger field intensity. The temperature of the maximum increases with field intensity, but saturates to a constant value near 25 K (the exact temperature depends on the sample) at high intensity. In single-crystal graphite, a maximum in resistivity as a function of temperature is also present, but has the effects of Landau level quantization superimposed. Several possible explanations for the resistivity maximum are proposed, but a complete explanation awaits detailed calculations involving the energy band structure of graphite, and the particular scattering mechanisms involved.
Document ID
19760048546
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Woollam, J. A.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Kreps, L. W.
(NASA Lewis Research Center Cleveland, OH, United States)
Rojeski, M.
(NASA Lewis Research Center Cleveland, OH, United States)
Vold, T.
(NASA Lewis Research Center Cleveland, OH, United States)
Devaty, R.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1976
Subject Category
Solid-State Physics
Meeting Information
Meeting: American Physical Society, Meeting
Location: Atlanta, GA
Start Date: March 29, 1976
End Date: April 1, 1976
Sponsors: American Physical Society
Accession Number
76A31512
Distribution Limits
Public
Copyright
Other

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