Abstract
A relatively new method is developed to numerically calculate the spin-wave-related properties of a magnetic body of arbitrary shape. Starting with a discrete dipole approximation and the linearized Landau-Lifshitz equation, the resonant frequencies and the associated amplitudes of the individual moments are obtained for all modes; from this information we are able to calculate the energy absorbed by the various modes excited by a position- and time-dependent external magnetic field. The method has been demonstrated for a number of cases including thin disks and rings and for equilibrium configurations ranging from the saturated high-field limit to the vortex states at low fields.
| Original language | English |
|---|---|
| Article number | 10E309 |
| Journal | Journal of Applied Physics |
| Volume | 97 |
| Issue number | 10 |
| DOIs | |
| State | Published - May 15 2005 |
Bibliographical note
Funding Information:We have developed a method for calculating the resonant modes and the absorption characteristics of a magnetic body of arbitrary shape in an arbitrary static and dynamic magnetic field that is applicable in the linear regime. The techniques have been demonstrated for a vortex ground state in a three-dimensional (3D) disk. This work was supported by NSF Grant No. ECS-0224210.
Funding
We have developed a method for calculating the resonant modes and the absorption characteristics of a magnetic body of arbitrary shape in an arbitrary static and dynamic magnetic field that is applicable in the linear regime. The techniques have been demonstrated for a vortex ground state in a three-dimensional (3D) disk. This work was supported by NSF Grant No. ECS-0224210.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China | ECS-0224210 |
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China |
ASJC Scopus subject areas
- General Physics and Astronomy