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We study the effect of the ferromagnetic (FM) contacts on the spinaccumulation in the lateral spin valve system for the collinear magnetizationconfigurations. When an additional FM electrode is introduced in theall-metallic lateral spin-valve system, we find that the transresistance can befractionally suppressed or very weakly influenced depending on the position ofthe additional FM electrode, and relative magnitudes of contact resistance andthe bulk resistance defined over the spin diffusion length. Nonlocal spinsignals such as nonlocal voltage drop and leakage spin currents are independentof the magnetization orientation of the additional FM electrode. Even when theadditional contact is nonmagnetic, nonlocal spin signals can be changed by thespin current leaking into the nonmagnetic electrode.

Effect of ferromagnetic contacts on spin accumulation in an all-metallic lateral spin-valve system: Semiclassical spin drift-diffusion equations