This PDF file includes:

• section S1. Comparison of the transport properties of SmB₆ thin films and single-crystal bulk specimens
  
• section S2. Magnetoresistance and Hall effect
  
• section S3. Additional data on crystalline and chemical stoichiometry characterizations
  
• section S4. SOT-induced switching of perpendicularly magnetized CoFeB
  
• section S5. Current distribution in multilayer thin films
  
• fig. S1. Resistance ratio as a function of sample thicknesses.
  
• fig. S2. Magnetoresistance of SmB₆ thin films.
  
• fig. S3. Hall resistance of SmB₆ thin films.
  
• fig. S4. Additional XRD data of SmB₆ thin films.
  
• fig. S5. XPS spectrum of SmB₆ thin films.
  
• fig. S6. Additional SOT switching results of various temperatures.
  
• fig. S7. A schematic diagram of the anomalous Hall voltage measurement under the presence of a nonmagnetic shunting layer.
  
• fig. S8. Temperature dependence of resistance of SmB₆ and CoFeB/W multilayers.
  
• fig. S9. Sheet resistance of CoFeB/W multilayer as a function of W thicknesses.
  
• References (43, 44)

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