Preparation and properties of amorphous Mg B2/MgO superstructures: Model disordered superconductor

Abstract

In this paper, we introduce a unique method for fabricating Mg B2/MgO multilayers and demonstrate the potential for using them as a new model for disordered superconductors. In this approach, we control the annealing of the Mg B2 to yield an interesting new class of disordered (amorphous) superconductors with relatively high transition temperatures. The multilayers appear to exhibit quasi-two-dimensional superconductivity with controlled anisotropy. We discuss the properties of the multilayers as the thickness of the components of the bilayers vary. © 2008 The American Physical Society.