Switch useful at superconducting temperatures and comprising superconducting material
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
Jan 7, 1999
filing date -
Jan 7, 1999
priority date (Note) -
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Abstract
The present invention is directed, inter alia, to a switch comprising: (A) a superconducting material whose field cooled and zero field cooled ac permittivities differ from each other, and whose field cooled and zero field cooled ac susceptibilities differ from each other, in a range of temperature below the superconducting transition temperature of the material; (B) means for applying a static magnetic field to said material; (C) means for controllably applying to said material an oscillating magnetic field of a magnitude effective to convert said material from a state exhibiting filed cooled permittivity to a state exhibiting zero field cooled permittivity; and (D) means for applying to said material a heat pulse effective to convert said material from a state exhibiting zero field cooled permittivity to a state exhibiting field cooled permittivity, said switch operating between a superconducting zero field cooled state and a superconducting field cooled state. The present invention is also directed, inter alia, to a method of making such a switch.
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