Micromagnetic Model Analysis of Spin-Torque Oscillator (STO) Integrated into Recording Head for Microwave-Assisted Magnetic Recording-Oscillation of STO Versus Rise Time of In-Gap Field

Yasushi Kanai, Ryo Itagaki, Simon J. Greaves, Hiroaki Muraoka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Stable oscillation is one of the most important factors for spin-torque oscillators (STOs) used in a microwave-assisted magnetic recording system. We use a micromagnetic, integrated STO model, in which the STO is inserted into the main pole-trailing shield (MP-TS) gap of a write head, and show that the rise time of the in-gap field acting on the STO is critical to stable STO oscillation. We also show that the combination of a tilted STO and a tilted MP-TS gap results in stable STO oscillation due to weaker magnetostatic interactions between the STO and the write head.

Original languageEnglish
Article number8409462
JournalIEEE Transactions on Magnetics
Volume54
Issue number11
DOIs
Publication statusPublished - 2018 Nov

Keywords

  • Micromagnetic simulation
  • microwave-assisted magnetic recording (MAMR)
  • rise time of in-gap field
  • spin torque oscillator (STO)
  • write heads

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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