High-resolution observation of magnetization processes in 2 μm × 2 μm × 0.04 μm permalloy particles

K. Runge, Y. Nozaki, Y. Otani, H. Miyajima, B. Pannetier, T. Matsuda, A. Tonomura

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Abstract

The magnetization process in an array of 2 μm × 2 μm × 0.04 μm permalloy particles fabricated on a 100 nm carbon membrane was investigated by means of high-resolution Lorentz microscopy and electron holography in magnetic fields parallel and perpendicular to the film surface. For perpendicular fields, the magnetization reversal was found to begin with the nucleation of a vortex which gradually transformed into a closure domain configuration. At the remanent state, the flux closure was achieved with the generation of a new type of doubled domain wall.

Original languageEnglish
Pages (from-to)5075-5077
Number of pages3
JournalJournal of Applied Physics
Volume79
Issue number8 PART 2A
DOIs
Publication statusPublished - 1996 Apr 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Runge, K., Nozaki, Y., Otani, Y., Miyajima, H., Pannetier, B., Matsuda, T., & Tonomura, A. (1996). High-resolution observation of magnetization processes in 2 μm × 2 μm × 0.04 μm permalloy particles. Journal of Applied Physics, 79(8 PART 2A), 5075-5077. https://doi.org/10.1063/1.361921