Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-07-30
Phys. Rev. B 78, 214427 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
13 pages, 1 figure, revised version
Scientific paper
10.1103/PhysRevB.78.214427
We study the effect of the ferromagnetic (FM) contacts on the spin accumulation in the lateral spin valve system for the collinear magnetization configurations. When an additional FM electrode is introduced in the all-metallic lateral spin-valve system, we find that the transresistance can be fractionally suppressed or very weakly influenced depending on the position of the additional FM electrode, and relative magnitudes of contact resistance and the bulk resistance defined over the spin diffusion length. Nonlocal spin signals such as nonlocal voltage drop and leakage spin currents are independent of the magnetization orientation of the additional FM electrode. Even when the additional contact is nonmagnetic, nonlocal spin signals can be changed by the spin current leaking into the nonmagnetic electrode.
Kim Tae-Suk
Lee Byeong-Cheol
Lee Hyun Woo
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