Dependence of magnetization switching property with microwave assistance on anisotropy field for ECC nano-pillar

Author

Narita, Naoyuki ; Tanaka, Terumitsu ; Kato, Ayumu ; Matsuyama, Kimihide ; Nozaki, Yukio

Author_Institution

ISEE, Kyushu Univ., Fukuoka, Japan

fYear

2010

fDate

21-24 Nov. 2010

Firstpage

1898

Lastpage

1901

Abstract

Magnetic resonance properties for ECC nano-pillar were numerically analyzed. The analysis showed there are three resonance modes in the ECC nano-pillar that ferromagnetic resonances (FMR) at the low and high frequency regions associating with the soft and hard material, and magnetic spin wave resonance at middle frequency region. Microwave assisted magnetization reversals were also simulated assuming ECC nano-pillar with extremely high anisotropy field hard magnetic material. Essential ac field strength and microwave frequency for magnetization reversal were found to be less dependent on anisotropy field for the hard magnetic material, when magnetization reversal is induced by magnetic resonance for the soft magnetic material.

Keywords

ferromagnetic resonance; magnetic anisotropy; magnetic switching; magnetisation reversal; nanomagnetics; nanostructured materials; permanent magnets; soft magnetic materials; ECC nanopillar; anisotropy field; exchange coupled composite structure; ferromagnetic resonances; field strength; hard magnetic material; magnetic spin wave resonance; magnetization switching property; microwave assistance; microwave assisted magnetization reversals; microwave frequency; soft magnetic material; Exchange-coupled-composite media; Microwave-assisted magnetization reversal; ferromagnetic resonance; spin wave resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2010 - 2010 IEEE Region 10 Conference

Conference_Location

Fukuoka

ISSN

pending

Print_ISBN

978-1-4244-6889-8

Type

conf

DOI

10.1109/TENCON.2010.5686413

Filename

5686413