Estimation of spin-diffusion length from the magnitude of spin-current absorption: Multiterminal ferromagnetic/nonferromagnetic hybrid structures

T. Kimura, J. Hamrle, and Y. Otani

Phys. Rev. B 72, 014461 – Published 25 July 2005

Abstract

We demonstrate the method to calculate the spatial distributions of the spin current and accumulation in the multiterminal ferromagnetic/nonmagnetic hybrid structure using an approximate electrotransmission line. The analyses based on the obtained equation yield the results, in good agreement with the experimental ones. This implies that the method allows us to determine the spin diffusion length of an additionally connected electrically floating wire from the reduction of the spin signal.

Received 25 February 2005

DOI:https://doi.org/10.1103/PhysRevB.72.014461

Authors & Affiliations

T. Kimura^1,2,3,*, J. Hamrle^2,3, and Y. Otani^1,2,3

¹Institute for Solid State Physics, University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
²RIKEN FRS, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
³CREST, JST, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan

^*Electronic address: kimura@issp.u-tokyo.ac.jp

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Vol. 72, Iss. 1 — 1 July 2005

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Physical Review B

covering condensed matter and materials physics