Abstract
Pulsed-current controlled wall motion in 20 μm wide × 200 μm long × 160 nm thick patterned Permalloy strips was studied using magnetic force microscopy. By sequential imaging, the displacement of Bloch walls as far as 200 μm along the strip was observed. The direction of motion was in the same direction as the carrier velocity, which reversed with current polarity. The displacement per pulse was dependent upon the sample thickness and current density, which suggests that the mechanism is a combination of s-d exchange and hydromagnetic domain drag forces.
| Original language | English |
|---|---|
| Pages (from-to) | 3047-3049 |
| Number of pages | 3 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 36 |
| Issue number | 5 I |
| DOIs | |
| State | Published - Sep 2000 |
| Event | 2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada Duration: 9 Apr 2000 → 12 Apr 2000 |
Bibliographical note
Funding Information:Manuscript received February 14, 2000. This work was supported in part by UMCP NSF-MRSEC. L. Gan, K. H. Aschenbach, M. Dreyer, and R. D. Gomez are with Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742 USA (e-mail: [email protected]). S. H. Chung is with the Department of Physics, University of Maryland, College Park, MD 20742 USA. Publisher Item Identifier S 0018-9464(00)08511-3.
Keywords
- Bloch wall
- Current pulse
- Domain drag
- Domains
- MFM
- Magnetization switching
- Permalloy
- S-d exchange