{TAIL ~ The high pinning stability} may be achieved using the same anti ferromagnetic materials for two spin valves by introducing {HEAD ~ a double synthetic anti ferromagnetic structure} in one of the two spin valves 
{ TAIL ~ The high pinning stability } may be achieved using the same anti ferromagnetic materials for two spin valves by introducing { HEAD ~ a double synthetic anti ferromagnetic structure } in one of the two spin valves
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH