Here, we present a planar superconducting quantum interference device (SQUID) structure consisting of four SQUIDs connected to antenna structures for simultaneous measurements of two magnetic field components. Using YBa2Cu3O7−x thin film technology, we are able to prepare gradiometer structures on strontium titanate (SrTiO3) tetracrystals containing two crossing 30° grain boundaries. This allows the production of four SQUID loops onto one substrate which can fulfill the high demands of symmetry inside the antenna structures. In our arrangement, the SQUID loops can act as independent field sensors which allow a measurement of two independent magnetic field gradient components.

Topics
Superconducting quantum interference device, Crystallographic defects, High temperature superconductors, Magnetic equipment, Superconducting devices, Measuring instruments, Magnetic fields, Signal processing, Thin films, Magneto-optical imaging
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© 2008 American Institute of Physics.
2008
American Institute of Physics
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