The irreversible magnetization process in microstructured permalloy ellipses

Y. C. Chang, C. C. Chang, J. C. Wu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Microstructured permalloy ellipses have been fabricated using electron-beam lithography through a lift-off process. The investigations were focused on the magnetization configurations and switching processes adopting magnetic force microscopy (MFM) and magnetoresistance (MR) measurements. An original five-vortex domain configuration of ellipse can be controlled and manipulated to become a four-vortex domain configuration by tuning the external magnetic field applied along the short-axis direction. In addition, an asymmetrical reversal process can be demonstrated on an ellipse having two- or three-vortex domain configuration, in which the switching fields are 36 Oe and 24 Oe, respectively.

Original languageEnglish
Pages (from-to)3742-3744
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2005 Oct 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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