{HEAD ~ A saturation magnetization Ms} of the free layer satisfies {TAIL ~ a relationship} 0≦Ms<√{square root over }{Jw/} 
satisfies
{ HEAD ~ A saturation magnetization Ms } of the free layer satisfies { TAIL ~ a relationship } 0≦Ms<√{square root over } { Jw/ }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH