Direct observation of magnetic process in quasi-antiferromagnet by high-resolution Kerr microscopy

Naoki Hashimoto, Shuu Horiike, Yuichiro Kurokawa, Terumitsu Tanaka, Po Chun Chang, Wen Chin Lin, Hiromi Yuasa

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated the relationship between the magnetic hysteresis loop and domain structure modulation of an artificial material, a quasi-antiferromagnet (AFM) with domains of alternating antiparallel magnetization fabricated by a strong 90° magnetic coupling between two ferromagnetic layers through an Fe-O thin layer. High-resolution Kerr images show simultaneous magnetization rotation, nucleation, and growth of stripe-type domains with maintained magnetization along the longitudinal direction of the domain. The nucleation and growth were dominant in the magnetization reversal of the quasi-AFM. By fitting not only the magnetization curve but also the domain structure to the Landau-Lifshitz-Gilbert equation, the 90° coupling coefficients were properly obtained, which enables us to design the magnetic structure of the quasi-AFM.

Original languageEnglish
Article numberSBBI05
JournalJapanese journal of applied physics
Volume60
Issue numberSB
DOIs
Publication statusPublished - May 2021

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Direct observation of magnetic process in quasi-antiferromagnet by high-resolution Kerr microscopy'. Together they form a unique fingerprint.

Cite this