further wherein the gap contains {HEAD ~ at least one layer} of {TAIL ~ superconducting material} arranged in a direction substantially perpendicular to the recording surface of the recording medium and 
further wherein the gap contains { HEAD ~ at least one layer } of { TAIL ~ superconducting material } arranged in a direction substantially perpendicular to the recording surface of the recording medium and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH