Simulations of 3-D domain wall structures in thin films

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March 2006, 6(2): 373-389. doi: 10.3934/dcdsb.2006.6.373

Simulations of 3-D domain wall structures in thin films

Xiao-Ping Wang ^1, , Ke Wang ^1, and Weinan E ^2,

1.	Department of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, China
2.	Department of Mathematics, Princeton University, Princeton, N.J. 08544, United States

Received September 2005 Revised September 2005 Published December 2005

Abstract
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Using the Gauss-Seidel projection method developed in [4] and [17], we simulate the three dimensional domain wall structures for thin films at various thickness. We observe transition from Néel wall to cross-tie wall and to Bloch wall as the thickness is increased. Periodic structures for cross-tie wall are also studied. The results are in good agreement with the experimental observations. Hysteresis loops are calculated for samples of various sizes. In particular, we study the effect of cross-tie wall in the switching process. These simulations have demonstrated high efficiency of the Gauss-Seidel projection method.

Keywords: Magnetic domain wall, Gauss-Seidel projection method..

Mathematics Subject Classification: Primary: 35Q99,65Z05; Secondary: 65M0.

Citation: Xiao-Ping Wang, Ke Wang, Weinan E. Simulations of 3-D domain wall structures in thin films. Discrete & Continuous Dynamical Systems - B, 2006, 6 (2) : 373-389. doi: 10.3934/dcdsb.2006.6.373

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