Title :
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
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2157114
