Observation and analysis of breakdown of magnetic tunnel junctions

W. Oepts, H.J. Verhagen, D.B. Mooij, de, V. Zieren, R. Coehoorn, W.J.M. Jonge, de

Research output: Contribution to journalArticleAcademicpeer-review

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At voltages larger than 1.2 V Co/Al2O3/Co(–Fe) magnetic tunnel junctions show almost immediate breakdown, leading to a decrease in (magneto) resistance. The position of the shorts formed is visualized by making use of a liquid crystal film on top of the junction. The breakdown voltages of a series of nominally identical junctions measured in a voltage-ramp experiment increased with larger ramp rate. The extrapolated lifetime, at lower voltages, is evaluated.
Original languageEnglish
Pages (from-to)164-166
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3
Publication statusPublished - 1999


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