{HEAD ~ a first magnetic metal layer} which is provided between {TAIL ~ the first magnetic material layer} and the first surface of the first nonmagnetic layer, and includes at least one element selected from Fe, Co and Ni; and 
is provided between
{ HEAD ~ a first magnetic metal layer } which is provided between { TAIL ~ the first magnetic material layer } and the first surface of the first nonmagnetic layer , and includes at least one element selected from Fe , Co and Ni ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH