Divergent diamagnetism in superconducting and normal metal composites near the percolation threshold

Journal Article · Mon Jan 23 04:00:00 EST 1984 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.52.299· OSTI ID:6616237

Bowman, D R; Stroud, D

The bare diamagnetic susceptibility chi of a composite superconductor below the percolation threshold p/sub c/ has been numerically calculated. A novel fitting procedure gives chiproportional(..delta..p)/sup -b/ near p/sub c/, with b = 1.29 in dimension d = 2, b = 0.35 in d = 3, the exponents agreeing between site and bond percolation to within 0.02 in both cases. Similar effects give a far-infrared absorption coefficient ..cap alpha.. in normal-metal--insulator composites varying as ..cap alpha..approx...omega../sup 2/(..delta..p)/sup() -s+b/2/ where s is the dielectric-constant exponent.

• Research Organization: Department of Physics, The Ohio State University, Columbus, Ohio 43210
• OSTI ID: 6616237
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:4; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360304* -- Composite Materials-- Physical Properties-- (-1987)
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
DATA
DIAMAGNETISM
ELEMENTS
INFORMATION
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MATERIALS
METALS
NUMERICAL DATA
NUMERICAL SOLUTION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTING COMPOSITES
THEORETICAL DATA