Superconductive quantum interference element
AssigneeSeiko Instruments Inc.
InventorAkikazu Odawara
Life of this patent
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Abstract
In a superconductive quantum interference element comprising Josephson joints, a washer coil and a detecting coil constituting a superconductive loop and a feedback modulation coil, to provide a superconductive quantum interference element capable of promoting spatial resolution by preventing an effective detection area of the detecting coil from enlarging even when a width of a superconductive wiring constituting the detecting coil and a superconductive film at a vicinity of the detecting coil are larger than an inner diameter of the detecting coil, there is constructed a superconductive quantum interference element having a structure provided with a slit at a detecting coil and/or a superconductive film at a periphery of the detecting coil.
Claims20
A superconductive quantum interference element fabricated using photolithography technology, comprising:
- a superconductive loop having a Josephson junction, a washer coil connected to the Josephson junction, and a detecting coil connected to the washer coil;
- and a feedback modulation coil magnetically coupled to the washer coil;
- wherein a slit is formed in at least one of the detecting coil and a superconductive film at a periphery of the detecting coil for passing a magnetic flux directed to the detecting coil in a magnetic flux repelled by the superconductive film.
A superconductive quantum interference element fabricated using photolithography technology, comprising:
- a first superconductive loop having a Josephson junction and a washer coil;
- a second superconductive loop having a detecting coil and an input coil, the second superconductive loop being magnetically coupled to the first superconductive loop;
- and a feedback modulation coil magnetically coupled to the washer coil;
- wherein a slit is formed in at least one of the detecting coil and a superconductive film at a periphery of the detecting coil for passing a magnetic flux directed to the detecting coil in a magnetic flux repelled by the superconductive film.
A SQUID comprising:
- a superconductive loop formed with superconductive thin films and having a washer coil, a Josephson junction connected to the washer coil, and a detecting coil connected to the washer coil;
- and a feedback modulation coil magnetically coupled to the washer coil;
- wherein a slit is formed in at least one of the detecting coil and a superconductive film located at a periphery of the detecting coil for passing a magnetic flux directed to the detecting coil.
Dependencies are inferred from the claim text.