Measurements after subtracting single-layer FM signals find Ta's dampinglike torque is negative and nearly unchanged for Ni, Permalloy, Fe, CoFeB, and FePt, indicating no orbital current torque.
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Absence of orbital current torque in Ta/ferromagnet bilayers
Measurements after subtracting single-layer FM signals find Ta's dampinglike torque is negative and nearly unchanged for Ni, Permalloy, Fe, CoFeB, and FePt, indicating no orbital current torque.