Dielectric breakdown of ferromagnetic tunnel junctions

W. Oepts; H.J. Verhagen; W.J.M. Jonge, de; R. Coehoorn

doi:10.1063/1.122462

Dielectric breakdown of ferromagnetic tunnel junctions

W. Oepts, H.J. Verhagen, W.J.M. Jonge, de, R. Coehoorn

Physics of Nanostructures

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Abstract

The time-dependent dielectric breakdown of Co/Al2O3/Co(-Fe) magnetic tunnel junctions is investigated. At voltages larger than 1.2 V, almost immediate breakdown of the junction is observed, leading to a decreased (magneto)resistance. The shorts, which are local hot spots, were visualized by making use of a liquid crystal film on top of the junction. The breakdown voltages of a series of nominally identical tunnel junctions measured in a voltage-ramp experiment are shown to increase with increasing ramp speed. The results are analyzed in the framework of several models for the voltage dependent breakdown probability.

Original language	English
Pages (from-to)	2363-2365
Number of pages	3
Journal	Applied Physics Letters
Volume	73
Issue number	16
DOIs	https://doi.org/10.1063/1.122462
Publication status	Published - 1998

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title = "Dielectric breakdown of ferromagnetic tunnel junctions",

abstract = "The time-dependent dielectric breakdown of Co/Al2O3/Co(-Fe) magnetic tunnel junctions is investigated. At voltages larger than 1.2 V, almost immediate breakdown of the junction is observed, leading to a decreased (magneto)resistance. The shorts, which are local hot spots, were visualized by making use of a liquid crystal film on top of the junction. The breakdown voltages of a series of nominally identical tunnel junctions measured in a voltage-ramp experiment are shown to increase with increasing ramp speed. The results are analyzed in the framework of several models for the voltage dependent breakdown probability.",

author = "W. Oepts and H.J. Verhagen and {Jonge, de}, W.J.M. and R. Coehoorn",

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AU - Jonge, de, W.J.M.

AU - Coehoorn, R.

PY - 1998

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N2 - The time-dependent dielectric breakdown of Co/Al2O3/Co(-Fe) magnetic tunnel junctions is investigated. At voltages larger than 1.2 V, almost immediate breakdown of the junction is observed, leading to a decreased (magneto)resistance. The shorts, which are local hot spots, were visualized by making use of a liquid crystal film on top of the junction. The breakdown voltages of a series of nominally identical tunnel junctions measured in a voltage-ramp experiment are shown to increase with increasing ramp speed. The results are analyzed in the framework of several models for the voltage dependent breakdown probability.

AB - The time-dependent dielectric breakdown of Co/Al2O3/Co(-Fe) magnetic tunnel junctions is investigated. At voltages larger than 1.2 V, almost immediate breakdown of the junction is observed, leading to a decreased (magneto)resistance. The shorts, which are local hot spots, were visualized by making use of a liquid crystal film on top of the junction. The breakdown voltages of a series of nominally identical tunnel junctions measured in a voltage-ramp experiment are shown to increase with increasing ramp speed. The results are analyzed in the framework of several models for the voltage dependent breakdown probability.

U2 - 10.1063/1.122462

DO - 10.1063/1.122462

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VL - 73

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EP - 2365

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

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Dielectric breakdown of ferromagnetic tunnel junctions

Abstract

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