Accession Number : AD0695802

Title :   FLUCTUATION EFFECTS IN THE RESISTIVE TRANSITION OF THIN FILAMENTARY SUPERCONDUCTORS.

Descriptive Note : Technical rept.,

Corporate Author : CORNELL UNIV ITHACA N Y LAB OF ATOMIC AND SOLID STATE PHYSICS

Personal Author(s) : Warburton,R. J. ; Patton,Bruce R. ; Webb,W. W. ; Wilkins,J. W.

Report Date : OCT 1969

Pagination or Media Count : 36

Abstract : A progress report on new and improved measurements of the resistive transitions in tin and tin-indium alloy whisker crystals shows results that can be fitted reasonably well from the onset at low temperature through the excess conductivity tail above the critical temperature by application of existing theories of intrinsic fluctuations. The breadth of the transitions seems to be quantitatively accounted for. The theory of Langer and Ambegaokar as modified by McCumber and Halperin is applicable at the lowest voltage portion of the onset of the transitions at least in pure tin crystals, and the Aslamazov-Larkin theory is applicable at the high temperature tail in alloy crystals. The current dependence of the voltage at T sub c and the entire transition shape for alloy whiskers fits a scheme of Masker, Marcelja, and Parks based on the time-dependent Ginsburg-Landau equations. (Author)

Descriptors :   (*WHISKERS(CRYSTALS), SUPERCONDUCTIVITY), (*SUPERCONDUCTORS, TRANSFORMATIONS), INTERMETALLIC COMPOUNDS, INDIUM ALLOYS, TIN ALLOYS, TRANSITION TEMPERATURE, ELECTRICAL CONDUCTIVITY

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE