Magnetization reversal and magnetic anisotropy in Co network nanostructures

Author

Lee, W.Y. ; Leung, H.T. ; Zhang, W. ; Xu, Y.B. ; Hirohata, A. ; Yao, C.C. ; Choi, B.-Ch. ; Hasko, D.G. ; Bland, J.A.C.

Author_Institution

Cavendish Lab., Cambridge Univ., UK

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3475

Lastpage

3477

Abstract

The magnetization reversal and magnetic anisotropy in Co network structures have been studied using magneto-optic Kerr effect (MOKE). An enhancement of the coercivity is observed in the network structures and is attributed to the pinning of domain walls by the hole edges in the vicinity of which the demagnetizing field spatially varies. We find that the magnetization reversal process is dominated by the intrinsic uniaxial anisotropy (2K_u/M_s≈200 Oe) in spite of the shape anisotropy induced by the hole edges. The influence of the cross-junction on the competition between the intrinsic uniaxial anisotropy and the induced shape anisotropy is discussed using micromagnetic simulations

Keywords

Kerr magneto-optical effect; cobalt; coercive force; ferromagnetic materials; magnetic anisotropy; magnetisation reversal; nanostructured materials; Co; Co network nanostructures; cross-junction; domain walls; hole edges; induced shape anisotropy; magnetic anisotropy; magnetization reversal; magneto-optic Kerr effect; micromagnetic simulations; network structures; pinning; shape anisotropy; Anisotropic magnetoresistance; Coercive force; Demagnetization; Kerr effect; Magnetic anisotropy; Magnetic domain walls; Magnetization reversal; Magnetooptic effects; Micromagnetics; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800562

Filename

800562