Abstract
We have investigated a ratchet effect of magnetic domain wall in asymmetric sawtooth-shaped ferromagnetic nanowires under high frequency AC magnetic fields by means of micromagnetic simulation. The ratchet phenomenon has been intensively examined during the domain wall propagation with variation of the asymmetric sawtooth geometry of nanowires as well as variation of the AC external field frequency/strength. Very interestingly, it has been found that there is a strong correlation between the spatial frequency of asymmetrical notches and the effective driving frequency/strength of AC external fields. It is demonstrated that number of notches swept by domain wall ratchet motion per each half-cycle of the driving frequency is controlled under a GHz AC driving field.
| Original language | English |
|---|---|
| Article number | 5467689 |
| Pages (from-to) | 1844-1847 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 46 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2010 |
Bibliographical note
Funding Information:This work was supported by the Korea Research Foundation (KRF) grant funded by the Korea government (MEST) (No. 2009-0072927) and by Nano R&D (2008-02553) programs through KOSEF.
Keywords
- Domain wall motion
- Ferromagnetic nanowire
- Ratchet effect
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