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An Effective Three-Dimensional Micromagnetic Method and Its Application to Magnetic Tunnel Junctions

Liu Yao-Wen1, Chen Yu-Guang1, Yang Ya-Ping1, Chen Hong1 and Martins J. L.2

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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.


PACS

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

75.40.Mg Numerical simulation studies

75.70.Kw Domain structure (including magnetic bubbles)

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Dates

Issue 5 (May 2005)

Received 9 November 2004



  1. An Effective Three-Dimensional Micromagnetic Method and Its Application to Magnetic Tunnel Junctions

    Liu Yao-Wen et al 2005 Chinese Phys. Lett. 22 1270

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