Superconducting properties and structure of vanadium after cryogenic deformation

The paper is concerned with the effect of low temperature (77 K) deformation by drawing (80%) on the superconducting properties and the structure of vanadium. The structure elements (fragment boundaries) which are responsible for the observed changes of the critical parameters are found. These regions of the rotational deformation localization exhibit a high defect density and serve as powerful sources of internal stresses in with the most changes of the electron-phonon coupling constant and electron free path length take place. The dislocation density in the fragment boundaries is estimated by processing the experimental data