Optimization of top-pinned perpendicular anisotropy tunnel junctions through Ta insertion

Optimization of top-pinned perpendicular anisotropy tunnel junctions through Ta insertion

We study the influence of a tantalum spacer layer sandwiched between the FeCoB polarizing section and the Co/Pt high anisotropy section in the reference layers of top-pinned perpendicular magnetic anisotropy magnetic tunnel junctions (MTJ). In addition to Kerr magnetometry, we use ferromagnetic reso...

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Veröffentlicht in:Japanese Journal of Applied Physics 2015-09, Vol.54 (9), p.90302
Hauptverfasser: Le Goff, Adrien, Soucaille, Remy, Tahmasebi, Taiebeh, Swerts, Johan, Furnemont, Arnaud, Devolder, Thibaut
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container_issue 9
container_start_page 90302
container_title Japanese Journal of Applied Physics
container_volume 54
creator Le Goff, Adrien
Soucaille, Remy
Tahmasebi, Taiebeh
Swerts, Johan
Furnemont, Arnaud
Devolder, Thibaut
description We study the influence of a tantalum spacer layer sandwiched between the FeCoB polarizing section and the Co/Pt high anisotropy section in the reference layers of top-pinned perpendicular magnetic anisotropy magnetic tunnel junctions (MTJ). In addition to Kerr magnetometry, we use ferromagnetic resonance (FMR) to obtain the coupling J through Ta and the anisotropies of all the magnetic parts of our MTJ. This layer-by-layer assignment is allowed by the distinct FMR frequency identities of each subsystem of the MTJ. A high J together with optimal Co/Pt properties is obtained for 4 Å of Ta.
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title Optimization of top-pinned perpendicular anisotropy tunnel junctions through Ta insertion
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