Abstract
We present here a study of exploiting Lorentz transmission electron microscopy to observe the magnetic structure in a nanobridge formed by confining a magnetic domain wall. The domain wall is nucleated in an elliptical pad by magnetization reversal and is driven to be pinned at the constriction to form a complex magnetic structure. High-resolution Lorentz microscopy shows that such a structure is composed by a mixture of S and C states of smooth rotation of the magnetization through the nanobridge rather than a conventional single wall as observed previously. This confinement contributes a domain wall resistance observed via anisotropic magnetoresistance presented previously. A serial transformation from S state to S/C mixture, to C state and finally to S state of the topology of the flux is evidently confirmed.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Magnetics |
| Volume | 47 |
| Issue number | 10 |
| Pages (from-to) | 2511-2514 |
| ISSN | 0018-9464 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
Keywords
- magnetic anisotropy
- magnetic domain walls
- magnetic structure
- magnetisation reversal
- magnetoresistance
- nanofabrication
- nanomagnetics
- nanostructured materials
- nucleation
- transmission electron microscopy