Effects of notches on the order of flux-closure state formation in bi-rings by micromagnetic simulation

doi:10.1088/1674-1056/20/12/127503

Abstract The effects of the number and the location of notches on the formation of flux-closure states in bi-rings with fields applied in the x direction (i.e., along the short axis direction of bi-rings) and y direction (i.e., along the long axis direction of bi-rings) are investigated using micromagnetic simulation. For the bi-rings with one notch and the bi-rings with two notches symmetric about y axis, the order of flux-closure state formation in each ring can be controlled. But the flux-closure state forms simultaneously in each ring for the bi-rings with two notches symmetric about x axis. For the bi-rings with two notches that are symmetric neither about x axis nor about y axis, only one ring can form a flux-closure state in the y-direction field and no flux-closure state can be found in rings in the x-direction field. Therefore, logic states can be defined by controlling the order of flux-closure state formation, which can be utilized in future logic devices.

Keywords: notch(es) the order flux-closure state formation micromagnetic simulation

Received: 13 May 2011
Revised: 25 July 2011
Accepted manuscript online:

PACS:	75.70.Kw	(Domain structure (including magnetic bubbles and vortices))
	75.78.Cd	(Micromagnetic simulations ?)
	75.40.Mg	(Numerical simulation studies)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50801033).

Cite this article:

He Shu-Ting(何淑婷), Chang Shuang-Quan(常双全), and Shi Hui-Gang(史慧刚) Effects of notches on the order of flux-closure state formation in bi-rings by micromagnetic simulation 2011 Chin. Phys. B 20 127503

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Effects of notches on the order of flux-closure state formation in bi-rings by micromagnetic simulation

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