The holed cross tie examples consists in studing a thin sheet of permalloy with random holes.
The sheet is rectangular with 0.64 micron of width, 1.28 micron of height & 0.01 micron of length.
The mesh constains 64 cells in X direction, 128 cells in Y direction & 1 cell in Z-direction.
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| mesh |
The matter parameters are as follow:
| Ms | Aimantations (A/m) | 1.7e6 |
| K | Anisotropy (J/m^3) | 1e5 |
| A | Exchange (J/m^3) | 1.e-9 |
| L | reference length (m) | 1.e-8 |
| Le=sqrt(2.A/Mu.Ms.Ms) | exchange length (m) | 2.35e-8 |
| L/Le | exchange influence | 0.42 |
The anisotropy direction U1 is uniformly in the Y-direction with uniaxial crystal type The initial magnetism M is oriented in the Y direction in half of the domain and in its opposite in the secund part.
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| initial magnetism value along y |
The simulation parameters are:
| relaxation | taylor expansion | |
| time | optimal | |
| relaxation rate | 1.e-8 | |
| toeplitz vector product | LC | |
| L/Le | exchange influence | 4.26 |
The the results are as follow:
The value of magnetism field at equilibrium state are plot as follow:
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| equilibrium magnetism value along x | equilibrium magnetism value along y | equilibrium magnetism value along z |
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| equilibrium magnetism vector with total magnetism module | equilibrium total magnetic excitation field norm |
