Porous anodic Al2O3 ayers for superconducting films

Abstract Porous anodic aluminium oxide layers have been applied as substrates forsuperconducting niobium films. Pores in aluminium oxide layers at certain conditions serve as ordered pinning structure. The degree of its ordering is estimated. Properties of superconductors on porous substrates are investigated. Correlation is observed between the period of pinning potential modulation obtained from technological regimes of aluminium development and that obtained from magnetic measurements.