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Quasi ballistic magnetization reversal

H. W. Schumacher·C. Chappert·R. C. Sousa·P. P. Freitas·J. Miltat
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Abstract

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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H. W. Schumacher, C. Chappert, R. C. Sousa, P. P. Freitas, J. Miltat. 2002-07-31. Quasi ballistic magnetization reversal. https://doi.org/10.1103/physrevlett.90.017204

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