Vortex Storage in High Tc Superconductors
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-29
High Tc oxide superconductors can be used for storing information using superconducting vortex lines. A thin film of superconductor is deposited on a substrate and using either patterned substrate or photo-resist technology, the superconducting film is inscribed with normal 10 and superconducting 12 regions (Fig. 1). The normal state can be defined either by the absence of the superconducting material (a hole) or alternatively can be thin superconducting material that has been changed to a normal material by, e.g., ion implantation. Information is stored by writing in by a heat pulse and bias magnetic field. The heat pulse can be applied with a laser pulse. The superconducting material is heated through its superconducting transition temperature in a magnetic field.