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