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An Effective Three-Dimensional Micromagnetic Method and Its Application to Magnetic Tunnel Junctions |
| LIU Yao-Wen;CHEN Yu-Guang;YANG Ya-Ping;CHEN Hong;Martins J. L. |
| 1Department of Physics, Tongji University, Shanghai 200092
2INESC Microsystems and Nanotechnologies, Rua Alves Redol 9, 1000 Lisbon, Portugal |
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| Cite this article: |
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LIU Yao-Wen, CHEN Yu-Guang, YANG Ya-Ping et al 2005 Chin. Phys. Lett. 22 1270-1273 |
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Abstract An effective three-dimensional micromagnetic method for predicting equilibrium configuration of magnetization states is presented with conjugate-gradient technique to minimize the total energy, which has a much faster convergence rate than that of the quasi-Newton method. As an application, magnetic tunnel junctions with pinholes in the ultrathin barrier are simulated. The calculated coupling field Hf increases with the pinhole density increase, corresponding to the decrease of barrier thickness. The free layer domain configuration of tunnel junction during the switching process is also demonstrated.
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| Keywords:
85.70.Kh
75.40.Mg
75.60.Ej
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Published: 01 May 2005
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| PACS: |
85.70.Kh
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(Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.)
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75.40.Mg
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(Numerical simulation studies)
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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