Experimental verification of comparability between spin-orbit and spin-diffusion lengths

Yasuhiro Niimi, Dahai Wei, Hiroshi Idzuchi, Taro Wakamura, Takeo Kato, Yoshichika Otani

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

We experimentally confirmed that the spin-orbit lengths of noble metals obtained from weak antilocalization measurements are comparable to the spin diffusion lengths determined from lateral spin valve ones. Even for metals with strong spin-orbit interactions such as Pt, we verified that the two methods gave comparable values which were much larger than those obtained from recent spin torque ferromagnetic resonance measurements. To give a further evidence for the comparability between the two length scales, we measured the disorder dependence of the spin-orbit length of copper by changing the thickness of the wire. The obtained spin-orbit length nicely follows a linear law as a function of the diffusion coefficient, clearly indicating that the Elliott-Yafet mechanism is dominant as in the case of the spin diffusion length.

Original languageEnglish
Article number016805
JournalPhysical Review Letters
Volume110
Issue number1
DOIs
Publication statusPublished - 2013 Jan 3
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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