Ultrasensitive Anomalous Hall Effect in Ta/CoFe/Oxide/Ta Multilayers

Figure 4

(a)-(b) Out-of-plane angular dependent resonance fields for sample Ta(0.8)/Co₂₀Fe₈₀(0.8)/MgO(0.8)/Ta(1.0) (in nm) in the as-deposited and 240°C annealed states. Hollow circles and solid lines represent experimental data and theoretical fitting of . Inset: typical FMR differential absorption spectra where the resonance field and peal-to-peak linewidth are defined. (c)-(d) Out-of-plane angular dependent resonance fields for sample Ta(0.8)/Co₂₀Fe₈₀(0.8)/HfO₂(0.8)/Ta(1.0) (in nm) in the as-deposited and 240°C annealed states. Hollow diamonds and solid lines represent experimental data and theoretical fitting of .

(a)

(b)

(c)

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