Microwave-Assisted Magnetic Recording on Exchange Coupled Composite Media

Simon John Greaves; Yasushi Kanai; Hiroaki Muraoka

doi:10.1109/TMAG.2015.2508922

Microwave-Assisted Magnetic Recording on Exchange Coupled Composite Media

Simon John Greaves, Yasushi Kanai, Hiroaki Muraoka

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Microwave-assisted magnetic recording (MAMR) on single layer and exchange coupled composite (ECC) media was simulated. The high-frequency field was modeled with a macrospin model and also micromagnetically using a spin-torque oscillator integrated into the write head. ECC media with a range of hard/soft layer thicknesses were optimized for MAMR, and the gain over a non-MAMR system was established. The results show a bigger gain from using MAMR when the hard/soft layer thickness ratio was small. MAMR systems were also less susceptible to changes in magnetostatic interactions between medium grains.

Original language	English
Article number	7360944
Journal	IEEE Transactions on Magnetics
Volume	52
Issue number	7
DOIs	https://doi.org/10.1109/TMAG.2015.2508922
Publication status	Published - 2016 Jul

Keywords

Micromagnetics
exchange coupled composite media
microwave assisted magnetic recording

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2015.2508922

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title = "Microwave-Assisted Magnetic Recording on Exchange Coupled Composite Media",

abstract = "Microwave-assisted magnetic recording (MAMR) on single layer and exchange coupled composite (ECC) media was simulated. The high-frequency field was modeled with a macrospin model and also micromagnetically using a spin-torque oscillator integrated into the write head. ECC media with a range of hard/soft layer thicknesses were optimized for MAMR, and the gain over a non-MAMR system was established. The results show a bigger gain from using MAMR when the hard/soft layer thickness ratio was small. MAMR systems were also less susceptible to changes in magnetostatic interactions between medium grains.",

keywords = "Micromagnetics, exchange coupled composite media, microwave assisted magnetic recording",

author = "Greaves, {Simon John} and Yasushi Kanai and Hiroaki Muraoka",

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N2 - Microwave-assisted magnetic recording (MAMR) on single layer and exchange coupled composite (ECC) media was simulated. The high-frequency field was modeled with a macrospin model and also micromagnetically using a spin-torque oscillator integrated into the write head. ECC media with a range of hard/soft layer thicknesses were optimized for MAMR, and the gain over a non-MAMR system was established. The results show a bigger gain from using MAMR when the hard/soft layer thickness ratio was small. MAMR systems were also less susceptible to changes in magnetostatic interactions between medium grains.

AB - Microwave-assisted magnetic recording (MAMR) on single layer and exchange coupled composite (ECC) media was simulated. The high-frequency field was modeled with a macrospin model and also micromagnetically using a spin-torque oscillator integrated into the write head. ECC media with a range of hard/soft layer thicknesses were optimized for MAMR, and the gain over a non-MAMR system was established. The results show a bigger gain from using MAMR when the hard/soft layer thickness ratio was small. MAMR systems were also less susceptible to changes in magnetostatic interactions between medium grains.

KW - Micromagnetics

KW - exchange coupled composite media

KW - microwave assisted magnetic recording

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Microwave-Assisted Magnetic Recording on Exchange Coupled Composite Media

Abstract

Keywords

ASJC Scopus subject areas

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