Biased quasi ballistic spin torque magnetization reversal
arXiv:0804.4840 · doi:10.1103/PhysRevLett.101.087201
Abstract
We explore the fundamental time limit of ultra fast spin torque induced magnetization reversal of a magnetic memory cell. Spin torque precession during a spin torque current pulse and free precessional magnetization ringing after spin torque pulse excitation is detected by time resolved magneto transport. Adapting the duration of the spin torque excitation pulse to the spin torque precession period allows suppression of the magnetization ringing and thus coherent control of the final orientation of the magnetization. In the presence of a hard axis bias field such coherent control enables an optimum ultra fast, quasi ballistic spin torque magnetization reversal by a single precessional turn directly from the initial to the reversed equilibrium state.
13 pages 3 Figures
References in corpus (12)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
- Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
- Observation of spin-transfer switching in deep submicron-sized and low-resistance magnetic tunnel junctions
- Synchronization of spin-transfer oscillators driven by stimulated microwave currents
- Phase Coherent Precessional Magnetization Reversal in Micro-scopic Spin Valve Elements
- Quasi ballistic magnetization reversal
- Spin torque, tunnel-current spin polarization and magnetoresistance in MgO magnetic tunnel junctions
- Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques
- Time-Resolved Spin Torque Switching and Enhanced Damping in Py/Cu/Py Spin-Valve Nanopillars
- Distribution of the magnetization reversal duration in sub-ns spin-transfer switching
Cited by in corpus (13)
- Tunneling magneto thermo power in magnetic tunnel junction nanopillars
- Single-shot time-domain studies of spin-torque-driven switching in magnetic tunnel junctions
- Determination of spin-dependent Seebeck coefficients of CoFeB/MgO/CoFeB magnetic tunnel junction nanopillars
- Electric breakdown in ultra-thin MgO tunnel barrier junctions for spin-transfer torque switching
- Manipulation of Ferromagnets via the Spin-Selective Optical Stark Effect
- Strong magnon softening in tetragonal FeCo compounds
- Tunnel magneto-Seebeck effect
- Tunneling magneto thermocurrent in CoFeB/MgO/CoFeB based magnetic tunnel junctions
- Current-pulse-induced magnetic switching in standard and nonstandard spin-valves
- Excitation and coherent control of magnetization dynamics in magnetic tunnel junctions using acoustic pulses
- Current-induced dynamics of composite free layer with antiferromagnetic interlayer exchange coupling
- Influence of sample geometry on inductive damping measurement methods
- Parameter dependence of resonant spin torque magnetization reversal