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arXiv · 1202.2901

Magnetic bit stability: Competition between domain-wall and monodomain switching

Silas Hoffman·Yaroslav Tserkovnyak·Pedram Khalili Amiri·Kang L. Wang
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Abstract

We numerically study the thermal stability properties of computer memory storage realized by a magnetic ellipse. In the case of practical magnetic random-access memory devices, the bit can form a spin texture during switching events. To study the energy barrier for thermally-induced switching, we develop a variational procedure to force the bit to traverse a smooth path through configuration space between the points of stability. We identify textured configurations realizing domain-wall propagation, which may have an energy barrier less than that of the corresponding monodomain model. We contrast the emergence of such micromagnetic effects in thermal versus field-induced switching.

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Silas Hoffman, Yaroslav Tserkovnyak, Pedram Khalili Amiri, Kang L. Wang. 2012-02-14. Magnetic bit stability: Competition between domain-wall and monodomain switching. https://doi.org/10.1063/1.4716023

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