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

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

2012-02-14

arxiv.org/abs/1202.2901v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

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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