Hopping conduction and superconductivity in granular aluminum

Conference · Sun Jan 01 00:00:00 EST 1978 · AIP (Am. Inst. Phys.) Conf. Proc.; (United States)

OSTI ID:6628952

McLean, W L; Lindenfeld, P; Worthington, T

We have measured the electrical resistance as a function of temperature and magnetic field in superconductive granular aluminum specimens with room temperature resistivities up to 0.04 ..cap omega..-cm. In the normal state conduction is dominated by thermally activated hopping although the variation of log R with T cannot be described by a simple power law. Superconducting fluctuations persist in fields up to 55 kG even above 2T/sub c/. At higher fields there is a negative quadratic magnetoresistance which we interpret in terms of the Zeeman contribution to the characteristic energy in the expression for the hopping conductivity.

• Research Organization: Rutgers-the State Univ., New Brunswick, NJ
• OSTI ID: 6628952
• Report Number(s): CONF-770925-
• Journal Information: AIP (Am. Inst. Phys.) Conf. Proc.; (United States), Vol. 40; Conference: Electrical transport and optical properties of inhomogeneous media conference, Columbus, OH, USA, 7 Sep 1977
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
SUPERCONDUCTIVITY
GRAIN SIZE
MAGNETIC FIELDS
MAGNETORESISTANCE
ULTRALOW TEMPERATURE
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
MICROSTRUCTURE
PHYSICAL PROPERTIES
SIZE
360104* - Metals & Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)