Thermal stability parameters in synthetic antiferromagnetic free layers in magnetic tunnel junctions

Y. Saito, H. Sugiyama, K. Inomata

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We conducted a detailed comparative study of thermal stability properties of magnetic tunnel junctions (MTJs) with Ni81 Fe19, Co90 Fe10, and synthetic antiferromagnetic (Syn-AF) free layers. The properties were investigated using the junction magnetoresistance of current-perpendicular MTJ devices with a word line as probes. The observed sweep-rate-dependent coercivities were analyzed using the Sharrock formula. The results confirmed that the properties of Ku V kB T values in the MTJs with the Ni81 Fe19 free layer is mainly determined by the shape anisotropy, which is not true in the MTJs with the Co90 Fe10 and Syn-AF free layers. The study also confirmed that the effective volume of the Syn-AF free layer increased due to the interlayer coupling and that the shape anisotropy in the Syn-AF free layer was less than that in the mono-free layer.

Original languageEnglish
Article number10C914
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
Publication statusPublished - 2005 May 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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