Physics – Condensed Matter – Materials Science
Scientific paper
2004-04-27
published in Physical Review Letters, vol.92, No.16, 167204(2004)
Physics
Condensed Matter
Materials Science
15 pages with figures
Scientific paper
10.1103/PhysRevLett.92.167204
Recently it has been predicted that a spin-polarized electrical current perpendicular-to-plane (CPP) directly flowing through a magnetic element can induce magnetization switching through spin-momentum transfer. In this letter, the first observation of current-induced magnetization switching (CIMS) in exchange-biased spin-valves (ESPVs) at room temperature is reported. The ESPVs show the CIMS behavior under a sweeping dc current with a very high critical current density. It is demonstrated that a thin Ruthenium (Ru) layer inserted between a free layer and a top electrode effectively reduces the critical current densities for the CIMS. An "inverse" CIMS behavior is also observed when the thickness of the free layer increases.
Abe Sumiyoshi
Hirohata Atsufumi
Inomata Kunihiro
Jiang Yuming
Nozaki Takayuki
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