Figure 4: Polarization dependence of the differential Kerr of YIG/Pt. | Nature Communications

Figure 4: Polarization dependence of the differential Kerr of YIG/Pt.

From: Magneto-optical investigation of spin–orbit torques in metallic and insulating magnetic heterostructures

Figure 4

(a) Schematic of the measurements in which the IP magnetic field is parallel to the current and the polarization of the perpendicularly incident light (φp) is varied with respect to the field. (b) Comparison of the differential Kerr signal of YIG/Pt at lower fields for different polarizations of the light. (c) Polarization dependence of ΔθK at various external fields. While the differential Kerr signal shows a sinusoidal dependence at low fields, it is insensitive to the polarization at higher fields. (d) Amplitude of ΔθK due to IP oscillations extracted from a theoretical fit of equation (5) to the experiment. The solid line in d is a theoretical fit to cos 2φp. The contribution of the IP oscillation to ΔθK vanishes at φp≈40°.

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