Effective Write Field for Microwave Assisted Magnetic Recording

Author

Igarashi, M. ; Suzuki, Y. ; Miyamoto, H. ; Shiroishi, Y.

Author_Institution

Central Res. Lab., Hitach, Ltd., Tokyo, Japan

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

2507

Lastpage

2509

Abstract

The effective write field of microwave assisted magnetic recording (MAMR) was investigated using the Landau Lifshitz Gilbert (LLG) simulation and an analytical method. An effective component of high frequency (HF) field was obtained by considering the angle between the magnetization of recording media and the HF field generated from field generation layer (FGL). An analytical method to obtain the effective write field was proposed by using the switching properties of the recording medium graphically. The obtained effective write field has shown that the value of the maximal effective field gradient of 1850 Oe/nm is three times larger than that for Stoner-Wohlfarth effective write field.

Keywords

magnetic recording; magnetisation; Landau Lifshitz Gilbert simulation; MAMR; Stoner-Wohlfarth effective write field; field generation layer; high frequency field; magnetization; microwave assisted magnetic recording; recording media; Anisotropic magnetoresistance; Foot; Frequency; Hafnium; Laboratories; Magnetic analysis; Magnetic recording; Magnetization; Perpendicular magnetic recording; Research and development; Effective high frequency field; Landau Lifshitz Gilbert (LLG) simulation; effective write field; microwave assisted magnetic recording (MAMR); write field gradient;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2045644

Filename

5467611