Observation of superconducting transition temperature oscillations in metal--nonmetal film systems

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00658955· OSTI ID:7220149

Mikheyeva, M N; Golyanov, V M; Teplov, A A; Tsetlin, M B

For technetium-carbon, molybdenum-carbon, and vanadium-carbon thin-film layer structure an oscillatory dependence of the superconducting transition temperature on carbon layer thickness is found. The oscillation take place for thin metal layers (d<300A) and for very small thickness of the nonmetal film (d/sub c/<30A). In addition to the oscillations of T/sub c/, oscillations of the normal-state electrical resistance remaining up to room temperture are found in the layered samples. A correlation is observed between critical temperature and resistance changes; Maxima in the curve T/sub c/(d/sub c/) correspond to minima in rho (d/sub c/). The amplitude of the critical temperature oscillations is 10--15% of the T/sub c/ value and depends on the metal layer thickness, increasing with decreasing d approximately as 1/d. also found in the thin-film layer structures are oscillations of the critical magnetic fields H/sub cn/ and H/sub c/parallel correlating with T/sub c/ oscillations. A mutual influence of nonmetal layers located on opposite sides of the metal film was observed.

• Research Organization: I. V. Kurchatov Atomic Energy Institute, Moscow, USSR
• OSTI ID: 7220149
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 28:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
&amp; Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBON
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FILMS
LAYERS
MAGNETIC FIELDS
METALS
MOLYBDENUM
NONMETALS
PHYSICAL PROPERTIES
REFRACTORY METALS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TECHNETIUM
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VANADIUM