The interactions of two mutually inductive-coupled dc SQUIDs

We have investigated the strong interaction phenomena of two mutually inductive-coupled dc SQUIDs. The coupling coefficient between the two SQUIDs loop inductances is experimentally measured to be about 0.74. In addition to the voltage locking effects shown on the I-V curves of the SQUIDs, we have also observed synchronization and pulling of V-IM (modulation current) curves of the two SQUIDs due to their mutual interactions. © 1981.