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Experimental investigation of the effect of topological insulator on the magnetization dynamics of ferromagnetic metal: BiSbTe1.5Se1.5 and Ni80Fe20 heterostructure
We have studied the spin-pumping phenomenon in ferromagnetic metal (FM) (Ni80Fe20)/topological insulator (TI) (BiSbTe1.5Se1.5) bilayer system to understand magnetization dynamics of FM in contact with a TI. TIs embody a spin-momentum-locked surface state that spans the bulk band gap. Due to this special spin texture of the topological surface state, …