NEW PHENOMENA IN NANOSTRUCTURED MATERIALS

In recent years, a level of nanoscale fabrication has been achieved wh ere dimensions and energy scales are such that quantum effects are dom inant and can even be controlled in a variety of condensed matter syst ems. In this paper, several examples are given to illustrate the influ ence of nanostructuring on the physical properties of superconducting and normal magnetic systems. For superconductors we will discuss quant um interference effects in mesoscopic single loops and multiloop struc tures and the confinement of flux hues by a lattice of artificial subm icron antidots. For magnetic layers we will analyze the size dependenc e of the Rondo and spin-glass effects.