JOURNAL ARTICLE

Micromagnetic model analysis of dual field generation layer (FGL) spin torque oscillators (STO) for microwave-assisted magnetic recording (MAMR).

  • Published In: International Journal of Applied Electromagnetics & Mechanics, 2023, v. 71. P. S191 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Itagaki, Ryo; Kanai, Yasushi; Greaves, Simon 3 of 3

Abstract

This article focuses on the investigation of dual field generation layer (FGL) spin torque oscillators (STOs) integrated into write heads for microwave-assisted magnetic recording (MAMR). The study found that stable STO oscillation is achieved by employing antiferromagnetic exchange coupling between the two FGLs, with a thickness of 5 nm for each FGL being optimal. Unlike single FGL STOs, the dual FGL STO's oscillation frequency can be widely tuned from 38 GHz to 73 GHz by varying the injected current density, enabling potential applications in dual-layer recording without requiring multiple STOs. Media recording simulations demonstrated that the dual FGL STO improves the signal-to-noise ratio (SNR) across a range of recording media, suggesting its suitability for enhancing recording density in future MAMR technologies.

Additional Information

  • Source:International Journal of Applied Electromagnetics & Mechanics. 2023/04, Vol. 71, pS191
  • Document Type:Article
  • Subject Area:Computer Science
  • Publication Date:2023
  • ISSN:1383-5416
  • DOI:10.3233/JAE-220146
  • Accession Number:163109492
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