MAMR writability and signal-recording characteristics on granular exchange-coupled composite media

T. Tanaka, K. Kurihara, X. Ya, Y. Kanai, X. Bai, K. Matsuyama

Research output: Contribution to journalArticlepeer-review

Abstract

Exchange-coupled composite (ECC) media present a possible layered structure for microwave-assisted magnetic recording (MAMR) systems. In this paper, MAMR writability and read/write characteristics were computed using a micromagnetic simulation, which assumed ECC media with graded and notched anisotropy structures. Writability was estimated from the switchable maximum averaged anisotropy field for footprint images. The calculation indicated 40–50% enhanced writability by microwave assistance for both graded and notched anisotropy structure media with suitable magnetic parameters. A read/write simulation indicated that notched-structure media with strongly coupled magnetic layers tended to be advantageous for signal-to-noise ratio and indicated well-confined recorded bits with a narrow magnetic write width.

Original languageEnglish
Article number167884
JournalJournal of Magnetism and Magnetic Materials
Volume529
DOIs
Publication statusPublished - Jul 1 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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