Current-controlled bi-stable domain configurations in Ni 81Fe19 elements: An approach to magnetic memory devices

Hyun Cheol Koo, C. Krafft, R. D. Gomez

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The discovery of current-switchable bi-stable remanent domain configurations on small ferromagnetic islands is reported. Rectangular NiFe islands with a thickness of 50 to 100 nm and lateral dimensions on the order of several microns were imaged using magnetic force microscopy after application of 10 ns current pulses through the material. The closure configuration can be set into either the 4 or 7 domain configuration by applying positive or negative current polarity at density on the order 107A/cm2. The chirality of the closure patterns is fixed, implying that only two rather than four states are stable in these patterns. The possibility of using these configurations as a means of storing a logic state for memory applications is discussed.

Original languageEnglish
Pages (from-to)862-864
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number5
DOIs
Publication statusPublished - 2002 Jul 29
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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