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