|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Vortex motion in a finite-size easy-plane ferromagnet and application to a nanodot | | Denis D. Sheka
; Juan P. Zagorodny
; Jean-Guy Caputo
; Yuri Gaididei
; Franz G. Mertens
; | | Date: |
29 Oct 2004 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | We study the motion of a non-planar vortex in a circular easy-plane ferromagnet, which imitates a magnetic nanodot. Analysis was done using numerical simulations and a new collective variable theory which includes the coupling of Goldstone-like mode with the vortex center. Without magnetic field the vortex follows a spiral orbit which we calculate. When a rotating in-plane magnetic field is included, the vortex tends to a stable limit cycle which exists in a significant range of field amplitude B and frequency $omega$ for a given system size L. For a fixed $omega$, the radius R of the orbital motion is proportional to L while the orbital frequency $Omega$ varies as 1/L and is significantly smaller than $omega$. Since the limit cycle is caused by the interplay between the magnetization and the vortex motion, the internal mode is essential in the collective variable theory which then gives the correct estimate and dependency for the orbit radius $Rsim B L/omega$. Using this simple theory we indicate how an ac magnetic field can be used to control vortices observed in real magnetic nanodots. | | Source: | arXiv, cond-mat/0410779 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER