Increase of the critical temperature due to low-temperature twinning of superconducting niobium
Bobrov V. S. , Zorin S. N.
The critical temperature Tc of niobium is observed to increase appreciably as a result of low-temperature twinning. The superconductivity near the twins is altered by dislocation plastic flow and warming of the strained samples. Data on the magnetic-field dependence of Tc are presented.