Abstract
Using micromagnetic simulations, the authors investigate the effects of the shape anisotropy of nanowires on the threshold current density (JC) in the adiabatic limit. It is observed that the type of domain wall significantly affects the dependence of JC on the shape anisotropy. For a transverse wall, JC is proportional to the shape anisotropy, but slightly deviates from, the theoretical prediction [G. Tatara and H. Kohno, Phys. Rev. Lett. 92, 086601 (2004)] possibly due to antivortex formation. For a vortex wall, JC is almost independent of the shape anisotropy, as experimentally observed [A. Yamaguchi et al., Jpn. J. Appl. Phys. Part 1 45, 3850 (2006)]. Interestingly, JC and the velocity of the vortex wall at finite temperatures are in good agreement with the experimental values even when the nonadiabatic spin torque is not considered.
| Original language | English |
|---|---|
| Article number | 252508 |
| Journal | Applied Physics Letters |
| Volume | 90 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - 2007 |
Bibliographical note
Funding Information:This work was supported by a Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2006-311-D00102) and the Korea Science and Engineering Foundation (KOSEF) through the National Research Laboratory Program funded by the Ministry of Science and Technology (No. M10600000198-06J0000-19810). The authors would like to acknowledge the support provided by Korea Institute of Science and Technology Information (KISTI) under The Strategic Supercomputing Support Program with Sik Lee as the technical supporter. The use of the computing system of the Supercomputing Center is also greatly appreciated.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)