Theory of Hysteresis Loop in Ferromagnet
| dc.creator | Lyuksyutov, Igor F. | |
| dc.creator | Nattermann, Thomas | |
| dc.creator | Pokrovsky, Valery | |
| dc.date | 1997-09-17 | |
| dc.date | 1997-09-20 | |
| dc.date.accessioned | 2026-07-07T09:02:46Z | |
| dc.date.available | 2026-07-07T09:02:46Z | |
| dc.description | A theory of the hysteresis loop in ferromagnets controlled by the domain wall motion is presented. Domain walls are considered as plane or linear interfaces moving in a random medium under the action of the external ac magnetic field $H=H_0\sinωt$. We introduce important characteristics of the hysteresis loop, such as dynamic threshold fields, reversal field etc. together with well known characteristics as coercive field and hysteresis loop area (HLA) $\cal A$. We show that all these characteristics are regulated by two dimensionless combinations of the $H_0$ and $ω$and intrinsic characteristics of the ferromagnet. The moving domain wall can create magnetic bubbles playing the role of pre-existing nuclei of the reversed magnetization. We discuss a simple model of this process. For magnetization reversal determined by domain inflation we predict that HLA scales as ${\cal A}\propto ω^βH_0^α$ with $α=1/2$ and $β=1/2$. Numerical simulations confirmthis result. | |
| dc.description | 5 pages, 1 figure, RevTex | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9709194 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9709194 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/148753 | |
| dc.subject | Materials Science | |
| dc.title | Theory of Hysteresis Loop in Ferromagnet | |
| dc.type | text |