Current perpendicular to the plane spin-valves with CoFeGe magnetic layers

Maat, S.; Carey, M. J.; Childress, J. R.
October 2008
Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p143505
Academic Journal
The magnetotransport properties of current perpendicular to the plane giant magnetoresistive spin-valves utilizing (CoFe)100-xGex alloys are investigated. The composition range of 21≤x≤32 at. % is determined to be the alloy composition that maximizes magnetoresistance. ΔRA values of 2.6 mΩ–μm2 are measured for spin-valves with CoFeGe in the free and reference layer resulting in magnetoresistance values of greater than 6%, which is almost twice the value of similar spin-valves with CoFeAl alloys. An analysis of the physical properties of the CoFeGe thin films in the range of interest is also presented.


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