a second magnetic material layer which comprises a magnetic material and has a second magnetization directed in the direction perpendicular to {TAIL ~ the film surface}, the direction of {HEAD ~ the second magnetization} reversing by spin polarized electrons 
a second magnetic material layer which comprises a magnetic material and has a second magnetization directed in the direction perpendicular to { TAIL ~ the film surface } , the direction of { HEAD ~ the second magnetization } reversing by spin polarized electrons
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH