Title :
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
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 ¿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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2033355
