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arXiv · 1211.1222

Experimental Verification of Comparability between Spin-Orbit and Spin-Diffusion Lengths

Yasuhiro Niimi·Dahai Wei·Hiroshi Idzuchi·Taro Wakamura·Takeo Kato·YoshiChika Otani
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Abstract

We experimentally confirmed that the spin-orbit lengths of noble metals obtained from weak anti-localization 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.

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Yasuhiro Niimi, Dahai Wei, Hiroshi Idzuchi, Taro Wakamura, Takeo Kato, YoshiChika Otani. 2013-01-07. Experimental Verification of Comparability between Spin-Orbit and Spin-Diffusion Lengths. https://doi.org/10.1103/physrevlett.110.016805

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