Magnetic and Microwave Properties of NiFe Nanowires Embedded in Anodized Aluminum Oxide (AAO) Templates

Author

Cho, Sang-Geun ; Yoo, Bongyoung ; Kim, Ki Hyeon ; Kim, Jongryoul

Author_Institution

Dept. of Metall. & Mater. Eng., Hanyang Univ., Ansan, South Korea

Volume

46

Issue

2

fYear

2010

Firstpage

420

Lastpage

423

Abstract

Ferromagnetic NiFe nanowire arrays were fabricated on porous alumina templates by an electrochemical method. The nanowires were controlled to have different diameter (100, 200 nm) and length (10, 20, 30 Â¿m) in order to understand the magnetostatic interactions between nanowires. Through the control of geometry of the arrays, the magnetization direction was shown to change from parallel to perpendicular to wire direction. The anisotropy field of these arrays was measured much higher than 1 kOe, which resulted in excellent microwave properties, particularly for noise suppression properties over 10 GHz.

Keywords

ferromagnetic materials; iron alloys; magnetic anisotropy; magnetostatics; nanofabrication; nanowires; nickel alloys; Al₂O₃; NiFe; anisotropy; electrochemical method; ferromagnetic nanowire arrays; magnetic properties; magnetization direction; magnetostatic interactions; microwave properties; noise suppression properties; size 10 mum; size 100 nm; size 20 mum; size 200 nm; size 30 mum; Aluminum oxide; Anisotropic magnetoresistance; Geometry; Magnetic anisotropy; Magnetic properties; Magnetization; Magnetostatics; Nanowires; Perpendicular magnetic anisotropy; Wire; Anodized aluminum oxide; ferromagnetic nanowires; microwave; noise suppressor;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2033355

Filename

5393157