Please use this identifier to cite or link to this item:
https://doi.org/10.1088/1367-2630/14/3/033010
Title: | Metastable magnetic domain wall dynamics |
Authors: | Jamali, M. Lee, K.-J. Yang, H. |
Issue Date: | Mar-2012 |
Citation: | 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/10.1088/1367-2630/14/3/033010 |
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 |
URI: | http://scholarbank.nus.edu.sg/handle/10635/56610 |
ISSN: | 13672630 |
DOI: | 10.1088/1367-2630/14/3/033010 |
Appears in Collections: | Staff Publications |
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