USA as Represented by Secretary of the Navy

Robert J Soulen, Jr

Mark B Johnson

Louis E Toth

James S Horwitz

Michael S Osofsky

Raymond Auyeung

Barry A Bender

Roy J Rayne

Doug B Chrisey

L David Jones

The order parameter of a superconductor is reduced by injecting spin-polarized carriers into the superconductor. The reduction in the order parameter is used to modulate the critical current of the superconductor. In a typical embodiment, a current is caused to flow through a superconductor. Spin polarized electrons are then injected into the path of the current in the superconductor by biasing a magnetic metal with respect to a terminal of the superconductor. The bias current may be varied to modulate the injection and thus the flow of current through the superconductor.

Method of controlling a super conductor

A machinable high Tc ceramic superconductor is formed by weighing and mixing appropriate stoichiometric amounts of Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3, and CuO (BSCCO), removing carbonates from the mixture, melting the mixture, casting the melted mixture into a mold, and inducing superconductivity and growth of randomly oriented platelets in the cast.

Machinable oxide ceramic

Growing community of inventors

Rockville, MD, United States of America

Robert J Soulen, Jr