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Example M-H loops for MgO(10 nm)/FeCoB(tFeCoB)/Ta(5 nm)/Si thin films annealed at 250 °C.
KefftFeCoB vs. tFeCoB for varying annealing temperature of MgO(10 nm)/FeCoB(tFeCoB)/Ta(5 nm)/Si. Inset: Perpendicular coercivity (Hc) vs tFeCoB.
KefftFeCoB vs. tFeCoB for Fe60Co20B20 and Co60Fe20B20 films with the “top” or “bottom” sequence annealed at 250 °C. Inset: Perpendicular coercivity (Hc) vs tFeCoB.
Dependence of saturation field, Hk, and coupling strength, σ, on Ta thickness. The shaded region corresponds to Ta thicknesses that provide both strong magnetic anisotropy and interlayer coupling.
Perpendicular M-H loops for case B films showing anti-ferromagnetic coupling through the Ta interlayer of varying thickness.
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