Lateral and vertical magnetic interactions in submicron-sized Fe ring arrays and Fe/Au/Fe trilayer ring structures

Makoto Kohda, Ken Takagi, Tetsuya Miyawaki, Kazuya Toyoda, Asaya Fujita, Junsaku Nitta

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have investigated the lateral and vertical magnetic interactions of submicron-sized Fe single-layer ring arrays and Fe/Au/Fe trilayer ring structures by measuring the magneto-optical Kerr effect. The lateral magnetic interaction significantly increases when the edge-to-edge distance of the ring array decreases to below 200 nm. The onion (vortex) to vortex (onion) transition field is proportional to 1/lnx with n = 2.37 (0.73). In the vertical magnetic interaction, the trilayer wide ring shows a drastic change of the magnetization reversal in comparison with the single-layer ring, whereas the trilayer narrow ring shows a clear onion (vortex) to vortex (onion) transition, which is similar to the magnetization reversal process of the single-layer ring.

Original languageEnglish
Pages (from-to)2164-2166
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number4 B
DOIs
Publication statusPublished - 2007 Apr 24

Keywords

  • MRAM
  • Magnetic ring structure
  • Magneto-optical Kerr effect
  • Magnetostatic interaction

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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