Dynamic control of metastable remanent states in mesoscale magnetic elements.
- Resource Type
- Article
- Authors
- Ding, J.; Jain, S.; Pearson, J. E.; Lendinez, S.; Khovaylo, V.; Novosad, V.
- Source
- Journal of Applied Physics. 2015, Vol. 117 Issue 17, p17A707-1-17A707-4. 4p. 5 Graphs.
- Subject
- *MAGNETIC materials
*MAGNETIC moments
*MAGNETIC anisotropy
*SPIN waves
*DEMAGNETIZATION
- Language
- ISSN
- 0021-8979
The formation of the vortex-antivortex-vortex (v-av-v) metastable remanent states in elongated magnetic elements have been systematically investigated using micromagnetic modeling. It is demonstrated that the v-av-v magnetization pattern can be effectively stabilized by exciting the single vortex state with an external RF field. Furthermore, we show that a set of different polarity combinations of the vortex cores can be achieved by adjusting the frequency and amplitude of the excitation field. The corresponding dynamic response in time- and frequency-domain has also been presented. Owing to the diversity of the collective modes with different vortex-antivortex combinations, this system may open promising perspectives in the area of spin transfer torque oscillators. [ABSTRACT FROM AUTHOR]