Improved magnetoresistance through spacer thickness optimization in tilted pseudo spin valves based on L1<inf>0</inf> (111)-oriented FePtCu fixed layers

C. L. Zha, Y. Y. Fang, J. Nogús, Johan Åkerman

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25 Citations (Scopus)

Abstract

Through optimization of the Cu spacer thickness, we demonstrate magnetoresistance (MR) up to 5% in FePtCu/CoFe/Cu/CoFe/NiFe pseudo spin valves based on L10 (111) FePtCu fixed layers with a tilted magnetization. We find an optimum spacer thickness of about 2.4 nm which correlates with a clear onset of strong interlayer exchange coupling below 2.4 nm and spin-independent current shunting in the spacer above 2.4 nm. We argue that yet higher MR should be possible through further reduction in the interlayer exchange coupling. © 2009 American Institute of Physics.
Original languageEnglish
Article number053909
JournalJournal of Applied Physics
Volume106
Issue number5
DOIs
Publication statusPublished - 1 Jan 2009

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