Seminars & Lectures
| * TITLE | Role of bound magnon in magnetic domain wall motion | ||||||
|---|---|---|---|---|---|---|---|
| * SPEAKERS | |||||||
|
|||||||
| * HOST(Applicant) | |||||||
|
|||||||
| * DATE / TIME | 2007-06-08, 2:30 - 3:30 p.m. | ||||||
| * PLACE | Science Building Ⅲ, Physics Seminar room at POSTECH | ||||||
| * ABSTRACT | |||||||
| Current-induced domain wall motion in a ferromagnetic nano wire has attracted much attention due to its possible device applications such as domain wall logic. While experimental results are building up, theories are controversial over some issues in describing the domain wall motion under spin current. In this work, I would like to present our quantum mechanical study of domain wall motion which supports the balance between the Gilbert damping torque ($\\alpha$ term) and non-adiabatic torque torque ($\\beta$ term) or $\\alpha = \\beta$. Our quantum approach elucidates the absence of the intrisic pinning due to the hard axis anisotropy, the origin of domain wall mass as the bound magnon mass, and the spin-transfer mechanism from spin current to domain wall. |
|||||||
