Josephson tunneling studies of magnetic screening in proximity effect superconductors

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6848634

Simon, R W

The periodic magnetic field dependence of the dc Josephson current has been used to study the magnetic screening properties of proximity effect superconductors. A series of junctions of the S-I-N-S' geometry have been measured for which the normal metal layers have been silver, tin, and aluminum. The effective magnetic penetration depth has been studied as a function of normal metal thickness, temperature, and composition of the N-S' sandwich both in a helium-4 cryostat and in a helium-3-4 dilution refrigerator. Thickness and temperature effects have been explained with good agreement by a numerical calculation and a characteristic penetration depth for each N-S' couple has been found that is independent of normal metal thickness and inversely proportional to the energy gap of the backing superconductor.

• Research Organization: California Univ., Los Angeles (USA)
• OSTI ID: 6848634
• 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
DATA
DIMENSIONS
ELEMENTS
ENERGY GAP
EXPERIMENTAL DATA
HETEROJUNCTIONS
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD
MAGNETIC FIELDS
METALS
NUMERICAL DATA
NUMERICAL SOLUTION
PROXIMITY EFFECT
SEMICONDUCTOR JUNCTIONS
SILVER
SUPERCONDUCTING JUNCTIONS
THICKNESS
TIN
TRANSITION ELEMENTS
TUNNEL EFFECT