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

Y. Saito; H. Sugiyama; K. Inomata

doi:10.1063/1.1853209

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

Y. Saito, H. Sugiyama, K. Inomata

Center for Innovative Integrated Electronic Systems (CIES)

Research output: Contribution to journal › Article › peer-review

6 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 language	English
Article number	10C914
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1853209
Publication status	Published - 2005 May 15

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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.",

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AU - Sugiyama, H.

AU - Inomata, K.

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N2 - 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.

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

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