Magnetic Interaction in Domain Wall Depinning at Square Notch and Antinotch Traps

Author

Chang, L.J. ; Yao, Y.D. ; Lin, Peng ; Lee, S.F.

Author_Institution

Inst. of Phys., Acad. Sinica, Taipei, Taiwan

Volume

47

Issue

10

fYear

2011

Firstpage

2519

Lastpage

2521

Abstract

In this paper, we report on domain wall (DW) pinning and depinning behavior using square notch and antinotch in NiFe nanowires. The presence of the DW in the samples was probed experimentally from focus magneto-optical Kerr effect (MOKE) measurement and anisotropic magnetoresistance (AMR). Pinning strengths as well as distribution of depinning field were measured. DW traps with antinotches were found to be more effective than notches, and the DW kept its structure during the depinning processes. Simulations of the magnetization orientation agreed with our results.

Keywords

Kerr magneto-optical effect; enhanced magnetoresistance; iron alloys; magnetic domain walls; magnetisation; nanofabrication; nanomagnetics; nanowires; nickel alloys; MOKE; NiFe; anisotropic magnetoresistance; antinotch traps; antinotches; domain wall depinning behavior; domain wall pinning behavior; focus magneto-optical Kerr effect measurement; magnetic interaction; magnetization orientation; nanowires; square notch; Magnetic domain walls; Magnetic domains; Magnetic resonance imaging; Nanowires; Perpendicular magnetic anisotropy; Wires; Current-induced domain wall motion; domain wall (DW);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2157114

Filename

6028001