Quasiballistic Magnetization Reversal
Abstract
We demonstrate a quasiballistic switching of the magnetization in a microscopic magnetoresistive memory cell. By means of time resolved magnetotransport, we follow the large angle precession of the free layer magnetization of a spin valve cell upon application of transverse magnetic field pulses. Stopping the field pulse after a 180° precession rotation leads to magnetization reversal with reversal times as short as 165ps. This switching mode represents the fundamental ultrafast limit of field induced magnetization reversal.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2003
- DOI:
- 10.1103/PhysRevLett.90.017204
- arXiv:
- arXiv:cond-mat/0207732
- Bibcode:
- 2003PhRvL..90a7204S
- Keywords:
-
- 75.60.Jk;
- 85.70.Kh;
- Magnetization reversal mechanisms;
- Magnetic thin film devices: magnetic heads;
- domain-motion devices etc.;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 16 pages, 4 figures, experimental. submitted to Phys. Rev. Lett