Quasi ballistic magnetization reversal

Details Quasi ballistic magnetization reversal Quasi ballistic magnetization reversal

2002-07-31

arxiv.org/abs/cond-mat/0207732v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 4 figures, experimental. submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.017204

We demonstrate a quasi ballistic switching of the magnetization in a microscopic mag-neto resistive memory cell. By means of time resolved magneto transport we follow the large angle precession of the free layer magnetization of a spin valve cell upon applica-tion of transverse magnetic field pulses. Stopping the field pulse after a 180 degree precession rotation leads to magnetization reversal with reversal times as short as 165 ps. This switching mode represents the fundamental ultra fast limit of field induced magnetization reversal.

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