Figure 3:The scheme and TEM image of a full film specular GMR stackand transvers curve. (a) The scheme of a specular GMR stack; (b) TEMimage of a specular GMR stack with Ta (1.5nm )/NiFeCr (3 nm)/PtMn (12nm)/CoFe (1.8nm)/Ru(0.85 nm)/CoFe (1 nm)/Nano oxides layer (NOL,1.3 nm)/CoFe (2 nm)/Cu (2.1 nm)/CoFe (0.8 nm)/NiFe(1.5 nm)/Cu0.8nm/Ta(1.2 nm) layers; (c) The transfer curve of the specular GMR full film witha MR value of 16% and a maximum sensitivity of 1.6% Oe-1 in a 10 Oe field.