Spin Torque Oscillator With Negative Magnetic Anisotropy Materials for MAMR

Author

Yoshida, Kazuetsu ; Yokoe, Masato ; Ishikawa, Yuma ; Kanai, Yasushi

Author_Institution

Dept. of Inf. & Commun. Eng., Kogakuin Univ., Tokyo, Japan

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

2466

Lastpage

2469

Abstract

Microwave assisted magnetic recording (MAMR) has recently emerged as a candidate to solve the trilemma in magnetic recording. In MAMR the magnetizations of recording medium can be switched with much lower magnetic field by magnetic resonance, which however requires a higher frequency oscillator than 20 GHz. In this paper, it is described that spin torque oscillator (STO) using a magnetic material with a large negative uniaxial anisotropy has a possibility to generate higher frequency and stable magnetic field and it might be preferable to a conventional oscillator with soft magnetic materials.

Keywords

magnetic anisotropy; magnetic recording; magnetic resonance; soft magnetic materials; spin dynamics; torque; MAMR; magnetic field; magnetic resonance; magnetizations; microwave assisted magnetic recording; negative magnetic anisotropy materials; soft magnetic materials; spin torque oscillator; Frequency; Magnetic anisotropy; Magnetic fields; Magnetic materials; Magnetic recording; Magnetic resonance; Microwave oscillators; Perpendicular magnetic anisotropy; Soft magnetic materials; Torque; Micromagnetic simulation; microwave assisted magnetic recording; negative uniaxial magnetic anisotropy; spin torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2043071

Filename

5467471