Micromagnetic Model Simulations Considering Write Head, Spin-Torque Oscillator, and Double-Layered Medium Altogether

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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Micromagnetic model simulations were performed to investigate spin-torque oscillators (STOs) integrated into the main pole-trailing shield (MP-TS) gap of the write head (integrated STO). First, the oscillation states of a tilted STO were investigated in a model comprising the write head, STO, and medium soft underlayer (SUL). We found that inserting the STO into a non-parallel MP-TS gap resulted in more stable oscillation. Second, we performed full micromagnetic simulations of the write head, STO, SUL, and recording layer (RL), and the oscillation of the tilted STO was investigated. We found that the RL affected the STO oscillation to some extent; however, the effect was smaller than that from the write head. We also discuss the calculation times for various structures with and without the RL, and with/without medium motion.

Original languageEnglish
Article number8472881
JournalIEEE Transactions on Magnetics
Volume55
Issue number3
DOIs
Publication statusPublished - 2019 Mar

Keywords

  • Micromagnetic simulation
  • microwave-assisted magnetic recording (MAMR)
  • recording medium
  • spin-torque oscillator (STO)
  • write heads

ASJC Scopus subject areas

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

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