Abstract
The research on the properties of weakly connected superconductors has been extended from two to more than two point contacts, carefully adjusted between two superconductors, in this way forming an interference grating. Special attention has been paid to the shape of the curves representing the voltage oscillations as a function of an applied magnetic field at constant applied current. The shape of these voltage oscillations appears to be in qualitative agreement with the calculated shape of the critical-current oscillations if one applies the basic Josephson relations to the multiple contact and neglects the self-inductances and mutual inductances of the holes between the contacts of the grating and if one further assumes that all contacts and holes are identical. The performance of the grating is discussed in comparison with a fluxconcentrator developed as a magnetometer in this laboratory.
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