Topological superconductors with topological surface states and strong spin-orbit coupling present exciting opportunities for fault-tolerant quantum computing and advanced spintronic applications. Among the few identified topological superconductors, β-${\mathrm{Bi}}_2\mathrm{Pd}$ is of particular interest for spintronic applications since it hosts superconductivity with spin-triplet pairing, offering the prospect of lossless spin supercurrent with infinite spin diffusion length. In this work, we explore the spin current phenomena in β-${\mathrm{Bi}}_2\mathrm{Pd}$ at room temperature. Through harmonic Hall and spin Hall magnetoresistance measurements, we reveal substantial, reliable, and robust charge-to-spin conversion in β-${\mathrm{Bi}}_2\mathrm{Pd}$. In particular, spin current phenomena exhibit a strong dependence on the crystalline order of β-${\mathrm{Bi}}_2\mathrm{Pd}$, underscoring the critical role of crystal integrity in shaping its topological states. Furthermore, we showcase energy-efficient spin-orbit torque switching in β-${\mathrm{Bi}}_2\mathrm{Pd}$-based spintronic devices. These findings position β-${\mathrm{Bi}}_2\mathrm{Pd}$ as a versatile and robust platform for spin current transport and lay the foundation for exploring spin supercurrent for advanced topological spintronic applications.

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• Magnetization switching
• Spin-orbit coupling
• Spin-orbit torque
• Spin-triplet pairing
• Symmetry protected topological states
• Alloys
• Thin films
• Topological superconductors