Abstract
The resistance versus temperature ( RT) characteristics and magnetoresistance ( MR) of 1/8 W nominal 68 Ω and 100 Ω Matsushita carbon resistors of grade ERC-18SG have been measured at temperatures between 8 and 0.05 K, in magnetic fields up to 84kOe (84 × 10 6/4 π Am −1). In both carbon resistors, the RT behaviour is expressed as R( T) = R 2exp{( T 2/ T) 1/2} in the high temperature region and as R( T) = R 4exp{( T 4/ T) 1/4} in the low temperature region. These relationships are explained as due to variable-range hopping conduction with and without the changing energy between isolated metallic grains, respectively. Negative and positive MR's have been observed in low and high magnetic fields, respectively. The negative MR increases with decreasing temperature at very low temperatures < 0.1 K. These phenomena are discussed in terms of the theory based on the strong Anderson localization.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
