Improved magnetoresistance through spacer thickness optimization in tilted pseudo spin valves based on L10 (111)-oriented FePtCu fixed layers
2009 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 106, no 5Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2009. Vol. 106, no 5
copper alloys, exchange interactions (electron), giant, magnetoresistance, iron alloys, magnetisation, nickel alloys, optimisation, platinum alloys, spin valves, 1 tb/in(2), media, multilayers
IdentifiersURN: urn:nbn:se:kth:diva-18767DOI: 10.1063/1.3211964ISI: 000269850300078ScopusID: 2-s2.0-70349330340OAI: oai:DiVA.org:kth-18767DiVA: diva2:336814
QC 201005252010-08-052010-08-052011-05-25Bibliographically approved