Magnetization chirality due to asymmetrical structure in Ni-Fe annular dots for high-density memory cells

Ryoichi Nakatani, Tetsuo Yoshida, Yasushi Endo, Yoshio Kawamura, Masahiko Yamamoto, Takashi Takenaga, Sunao Aya, Takeharu Kuroiwa, Sadeh Beysen, Hiroshi Kobayashi

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The magnetic states of the Ni-Fe asymmetric ring dots with partially planed outer sides were analyzed, using magnetic force microscopy and magneto-optical Kerr effect (MOKE) magnetometry. The shape of the magnetic states were analyzed by the scanning electron microscopy. The asymmetric ring dots were fabricate using electron beam lithography, DC sputtering and ion milling. The in-plane magnetic fields were found to control the magnetization chirality, either clockwise or counterclockwise, of vortical magnetizations of the assymmetric ring dots.

Original languageEnglish
Pages (from-to)6714-6716
Number of pages3
JournalJournal of Applied Physics
Volume95
Issue number11 II
DOIs
Publication statusPublished - 2004 Jun 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Nakatani, R., Yoshida, T., Endo, Y., Kawamura, Y., Yamamoto, M., Takenaga, T., Aya, S., Kuroiwa, T., Beysen, S., & Kobayashi, H. (2004). Magnetization chirality due to asymmetrical structure in Ni-Fe annular dots for high-density memory cells. Journal of Applied Physics, 95(11 II), 6714-6716. https://doi.org/10.1063/1.1667433