The sensor stack includes a free layer that is biased by direct exchange coupling with {HEAD ~ a layer} of {TAIL ~ antiferromagnetic material}  
of
The sensor stack includes a free layer that is biased by direct exchange coupling with { HEAD ~ a layer } of { TAIL ~ antiferromagnetic material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH