We study inverse spin and orbital Hall effects in 19 transition metals using spin pumping driven by ferromagnetic resonance. Spin-to-charge conversion was measured in YIG/X(5), while orbital-to-charge conversion was probed in YIG/Pt(2)/X(5) heterostructures. Here, X represents the different transition metals. We observe that even metals with relatively weak spin-orbit coupling can exhibit strong orbital-to-charge conversion. Surprisingly, the orbital contribution overwhelmingly dominates over the spin response, clarifying the challenge of disentangling these effects. Our results largely agree with first-principles predictions for spin and orbital Hall conductivities but reveal discrepancies in select materials.

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• Inverse spin Hall effect
• Spin pumping
• Spintronics
• Ferromagnetic resonance