Determination of the Pt spin diffusion length by spin-pumping and spin Hall effect

Wei Zhang, Vincent Vlaminck, John E. Pearson, Ralu Divan, Samuel D. Bader, Axel Hoffmann

Research output: Contribution to journalArticlepeer-review


The spin diffusion length of Pt at room temperature and at 8 K is experimentally determined via spin pumping and spin Hall effect in permalloy/Pt bilayers. Voltages generated during excitation of ferromagnetic resonance from the inverse spin Hall effect and anisotropic magnetoresistance effect were investigated with a broadband approach. Varying the Pt layer thickness gives rise to an evolution of the voltage line shape due to the superposition of the above two effects. By studying the ratio of the two voltage components with the Pt layer thickness, the spin diffusion length of Pt can be directly extracted. We obtain a spin diffusion length of ∼1.2 nm at room temperature and ∼1.6 nm at 8 K.

Original languageEnglish (US)
Article number242414
JournalApplied Physics Letters
Issue number24
StatePublished - Dec 9 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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