All-Magnonic Spin-Transfer Torque and Domain Wall Propagation
Abstract
The spin-wave transportation through a transverse magnetic domain wall (DW) in a magnetic nanowire is studied. It is found that the spin wave passes through a DW without reflection. A magnon, the quantum of the spin wave, carries opposite spins on the two sides of the DW. As a result, there is a spin angular momentum transfer from the propagating magnons to the DW. This magnonic spin-transfer torque can efficiently drive a DW to propagate in the opposite direction to that of the spin wave.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2011
- DOI:
- arXiv:
- arXiv:1106.4382
- Bibcode:
- 2011PhRvL.107q7207Y
- Keywords:
-
- 75.60.Jk;
- 75.30.Ds;
- 75.60.Ch;
- 85.75.-d;
- Magnetization reversal mechanisms;
- Spin waves;
- Domain walls and domain structure;
- Magnetoelectronics;
- spintronics: devices exploiting spin polarized transport or integrated magnetic fields;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- 4.3 pages, 4 figures