Reversal Mechanisms in Ferromagnetic Nanostructures

Author

Adeyeye, A.O. ; Goolaup, S. ; Singh, N. ; Jun, W. ; Wang, C.C. ; Jain, S. ; Tripathy, D.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

44

Issue

7

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

1935

Lastpage

1940

Abstract

We present a systematic investigation of the magnetic properties and magnetization reversal processes in arrays of magnetic nanostructures. We observed in magnetic rings that the transitions between different equilibrium states are strongly dependent on magnetostatic interactions. For magnetic nanowires, a transition from coherent rotation to curling mode of reversal as the thickness of the wire is varied for fixed lateral dimensions was observed. We found in anti-dot nanostructures that the magnetic anisotropy can be controlled by engineering the lattice geometry.

Keywords

exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic anisotropy; magnetisation reversal; nanowires; nickel alloys; Ni₈₀Fe₂₀; antidot nanostructures; coherent rotation; curling mode; equilibrium states; ferromagnetic nanostructures; lattice geometry; magnetic anisotropy; magnetic nanowires; magnetic rings; magnetization reversal; magnetostatic interactions; Magnetic nanostructures; magnetization reversal; magnetostatic interactions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2008.924539

Filename

4544892