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|Title:||Metastable magnetic domain wall dynamics|
|Source:||Jamali, M.,Lee, K.-J.,Yang, H. (2012-03). Metastable magnetic domain wall dynamics. New Journal of Physics 14 : -. ScholarBank@NUS Repository. https://doi.org/3/033010|
|Abstract:||The dynamics of metastable magnetic domain walls in straight ferromagnetic nanowires under spin waves, external magnetic fields and currentinduced spin-transfer torque are studied by means of micromagnetic simulations. It is found that in contrast to a stable wall, it is possible to displace a metastable domain wall in the absence of external excitation. In addition, independent of the domain wall excitation method, the velocity of a metastable wall is much smaller than that of a stable wall and its displacement direction could be different from that of the stable wall depending on the structure of metastable walls. Under current-induced spin-transfer torque excitation, the direction of domain wall displacement is directly related to the intensity of non-adiabatic spin-transfer torque. In a rough nanowire, it is found that the displacement of a metastable wall could happen much below the critical excitation of a stable wall. Furthermore, we show that it is possible to have either a forward or a backward displacement of a metastable domain wall by changing the pulse width of the excitation. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.|
|Source Title:||New Journal of Physics|
|Appears in Collections:||Staff Publications|
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