Critical magnetic field of very thin superconducting aluminum films

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.25.171· OSTI ID:5848031

Tedrow, P M; Meservey, R

We have measured the parallel critical magnetic field H/sub c/parallel of 4-nm-thick Al films. The conductance dI/dV of tunnel junctions made on these film was used to obtain for each film the orbital depairing parameter zeta and spin-orbit scattering parameter b which were then used in the theory of high-field superconductivity to calculate H/sub c/parallel. Comparison of the calculated and measured values shows the theory in its traditional form to be quantitatively lacking. When renormalization effects due to the electron-phonon interaction are included, the theory with no adjustable parameters gives a good description of H/sub c/parallel for the Al films. However, if the Al is coated with submonolayer thickness of heavy metal to increase b, the theory does not reproduce the measured H/sub c/parallel as well.

• Research Organization: Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5848031
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 25:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
CRITICAL FIELD
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELEMENTS
EXPERIMENTAL DATA
FILMS
INFORMATION
MAGNETIC FIELDS
METALS
NUMERICAL DATA
PHYSICAL PROPERTIES
PROXIMITY EFFECT
SUPERCONDUCTIVITY