The Dynamics of Microwave-Assisted Magnetic Recording

Author

Greaves, Simon ; Katayama, Takuto ; Kanai, Yasushi ; Muraoka, Hiroaki

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

51

Issue

4

fYear

2015

fDate

Apr-15

Firstpage

1

Lastpage

7

Abstract

Models of microwave-assisted magnetic recording are used to investigate the potential of the technology. With both single- and double-layer [exchange coupled composite (ECC)] media, the higher effective head field gradient led to reduced transition jitter and higher SNR in written tracks. To reduce the high-frequency field to a realistic frequency range, the use of ECC media is required. However, the ECC medium design must consider interactions between the spin torque oscillator and the medium.

Keywords

composite materials; exchange interactions (electron); magnetic heads; magnetic recording; magnetisation; ECC medium design; SNR; double-layer exchange coupled composite media; head field gradient; high-frequency field; microwave-assisted magnetic recording model; reduced transition jitter; single-layer exchange coupled composite media; spin torque oscillator; written tracks; Anisotropic magnetoresistance; Magnetic heads; Magnetization; Media; Resonant frequency; Signal to noise ratio; Switches; Microwave-assisted magnetic recording (MAMR); simulation; spin torque oscillator (STO);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2361751

Filename

7109972