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Experimental and simulation study to identify current-confined path in Cu-Al space layer for CPP-GMR spin-valve application RID G-9233-2011 RID E-1242-2011

Author:
Soh, Joon-Young  Kim, Sang-Pil  Kim, Young Keun  Lee, Kwang-Ryeol  Chung, Yong-Chae  Kawasaki, S.  Miyake, K.  Doi, M.  Sahashi, M.  


Journal:
IEEE TRANSACTIONS ON MAGNETICS


Issue Date:
2006


Abstract(summary):

To understand the mechanism of current-confined-path formation for the current-perpendicular-to-plane type of giant magnetoresistive devices, we have investigated the evolution of an Al monolayer on the Cu (111) surface both by in situ scanning tunneling microscopy and by molecular dynamics simulation. Ultrathin Al nano-clusters were formed on the plateaus and step (or plateau) edges of the Cu surface in the as-deposited state. Upon annealing at 300 degrees C, Al atoms migrated toward the step edges by surface diffusion. As a consequence, nanometer-sized Cu channels not covered by Al clusters can be formed. These channels could serve as current-confined paths if subsequent mild Al oxidation is provided.


Page:
2633---2635


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