| Issue |
EPL
Volume 84, Number 2, October 2008
|
|
|---|---|---|
| Article Number | 27008 | |
| Number of page(s) | 4 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/84/27008 | |
| Published online | 14 October 2008 | |
Euler equation of the optimal trajectory for the fastest magnetization reversal of nano-magnetic structures
Physics Department, The Hong Kong University of Science and Technology Clear Water Bay, Hong Kong SAR, China
Corresponding author: phxwan@ust.hk
Received:
5
May
2008
Accepted:
10
September
2008
The Euler equation of the optimal reversal trajectory for the fastest magnetization reversal is obtained for an arbitrary nano-magnetic structure. The Euler equation is useful in designing a magnetic field pulse and/or a polarized electric current pulse in magnetization reversal for two reasons. 1) It is straightforward to obtain the solution of the Euler equation, at least numerically, for a given magnetic nano-structure characterized by its magnetic anisotropy energy. 2) After obtaining the optimal reversal trajectory for a given magnetic nano-structure, finding a proper field/current pulse is an algebraic problem instead of the original non-linear differential equation.
PACS: 75.60.Jk – Magnetization reversal mechanisms / 75.75.+a – Magnetic properties of nanostructures / 85.70.Ay – Magnetic device characterization, design, and modeling
© EPLA, 2008
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