Figure 2

(a) Full scale conductance ratio curves for t = 1.5–2.0 nm. The schematic diagrams show an expected magnetization in MTJ with 2.0-nm-thick CoFeB under the magnetic field from negative to positive. The blue dotted arrows indicate the transition of the conductance ratio curves from negative to positive magnetic field. (b) NL curves for t = 1.5 to 2.0 nm from negative to positive magnetic field.