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