Superconducting properties and structure of vanadium after cryogenic deformation

Abstract

The effect of low temperature (77 K) deformation by drawing (80%) on the superconducting properties and structure of vanadium is studied. The structural elements (fragment boundaries) responsible for the observed changes of critical parameters are isolated. The electron-phonon coupling constant and the electron mean free path undergo most significant changes in these regions of rotational deformation localization, which have a high density of defects and are powerful sources of internal stresses. The dislocation density at the fragment boundaries is estimated.

A model for interpreting the positron annihilation characteristics of deformed metals; application to vanadium

“…Moreover, other TEM observations on vanadium rolled in the range 293-1273 K show that perfect cellular structures with regions of low dislocation density are not formed even for deformations in the range 50-94% [21]. Also, uniform distributions of dislocations are expected to be formed in the samples uniaxially deformed under the present conditions according to TEM observations of vanadium uniaxially deformed at 77 K and at RT [23].…”

Microstructure and Oxidation Behavior of Metal V Films Deposited by Magnetron Sputtering

“…It might be possible to fabricate thin film nano-patterns for optical, electrical or sensing applications using this material [3,4]. There has been extensive research on bulk vanadium [5,6,7,8]. In contrast, very little work has been reported on V thin films, whose properties may differ from those of bulk because of the small size in the direction of thickness and the interrupted continuity by the presence of surfaces and interfaces.…”