Figure 1

(a) Resistivity as a function of Au thickness $t$ for $\mathrm{Au}/\mathrm{YIG}$. The solid line represents semiclassical theoretic fittings. Inset is schematic diagram of multiple patterned strips with ascending thickness. (b) Field dependence of Hall resistance $R_H$ at different temperatures for $\mathrm{Au}(7\mathrm{nm})/\mathrm{YIG}$. Inset is schematic diagram of patterned Hall bar. (c) Carrier concentration as a function of temperature for $\mathrm{Au}(7\mathrm{nm})/\mathrm{YIG}$.Reuse & Permissions

Figure 2

(a) Field-dependent thermal voltage for $\mathrm{Pt}(5.1\mathrm{nm})/\mathrm{YIG}$ and $\mathrm{Au}(10\mathrm{nm})/\mathrm{YIG})$. Thermal voltage (left scale) and $\Delta \rho$ (right scale) for multiple strips as a function of Pt thicknesses (b) and Au thicknesses (c) on YIG. All thermal results are under a temperature difference of $\Delta T\approx 10\mathrm{K}$.Reuse & Permissions

Figure 3

(a) MR result of $\mathrm{Au}(7\mathrm{nm})/\mathrm{YIG}$ as a function of magnetic field $H$ at $\theta =0°({\rho }_{\parallel })$ and 90° (${\rho }_T$). (b) AMR ratio as a function of metal layer thickness $t$ for $\mathrm{Pt}/\mathrm{YIG}$ (open triangles) and $\mathrm{Au}/\mathrm{Pt}$ (open squares).Reuse & Permissions

Figure 4

(a) The optimized structural model of $\mathrm{Pt}/\mathrm{YIG}$. The teal (dark), coral (light grey), purple (grey), cyan (white), and red (dark grey) spheres represent for Pt, ${\mathrm{Fe}}_o$ (center of octahedron), ${\mathrm{Fe}}_t$ (center of tetrahedron), Y and O atoms, respectively. The thickness of the superlattice, denoted as $c$, is 15.6 Å after relaxation. The numerals in the left side label the Pt layers for the convenience of discussions. (b) Isosurfaces of spin density (at $0.03e/{\AA }^3$) of $\mathrm{Pt}/\mathrm{YIG}$. The blue (dark) and yellow (light grey) isosurfaces are positive and negative spin polarizations. (c) Planar averaged spin density along $c$ axis. The vertical dashed lines indicate the average $z$ coordinates of Pt and Au layers. Arrows $\uparrow$ and $\downarrow$ stand for the majority spin and minority spin contributions, respectively.Reuse & Permissions