Size dependence of magnetization reversal of ring shaped magnetic tunnel junction

C. C. Chen, C. Y. Kuo, Y. C. Chang, C. C. Chang, Lance Horng, Teho Wu, G. Chern, C. Y. Huang, M. Tsunoda, M. Takahashi, J. C. Wu

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Abstract

The size dependence of magnetization reversal of magnetic tunnel junction (MTJ) rings has been investigated. The MTJ rings, with outer diameter of 4, 2 and 1 μm and inner diameter of 1.5, 1 and 0.5 μm were fabricated by a top-down technique. The magnetoresistance curves manifest all of the magnetic domain configurations during magnetization reversal in different sized rings. Various transition processes were observed, such as four transition, three transition and two transition in the largest, middle and smallest MTJ ring, respectively. Furthermore, the biasing fields observed from major loops decrease with decreasing size, which may result from edge roughness produced in the ion-milling process.

Original languageEnglish
Pages (from-to)1900-1902
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 3
DOIs
Publication statusPublished - 2007 Mar 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Chen, C. C., Kuo, C. Y., Chang, Y. C., Chang, C. C., Horng, L., Wu, T., Chern, G., Huang, C. Y., Tsunoda, M., Takahashi, M., & Wu, J. C. (2007). Size dependence of magnetization reversal of ring shaped magnetic tunnel junction. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 3), 1900-1902. https://doi.org/10.1016/j.jmmm.2006.10.686