Characterization of Spin-Transfer-Torque effect induced magnetization dynamics driven by short current pulses

Abstract

We present a time-resolved study of the magnetization dynamics in a microstructured Cr$|$Heusler$|$Pt waveguide driven by the Spin-Hall-Effect and the Spin-Transfer-Torque effect via short current pulses. In particular, we focus on the determination of the threshold current at which the spin-wave damping is compensated. We have developed a novel method based on the temporal evolution of the magnon density at the beginning of an applied current pulse at which the magnon density deviates from the thermal level. Since this method does not depend on the signal-to-noise ratio, it allows for a robust and reliable determination of the threshold current which is important for the characterization of any future application based on the Spin-Transfer-Torque effect.

5 pages, 3 figures. arXiv admin note: text overlap with arXiv:1701.02094

References in corpus (4)

• Experimental prototype of a spin-wave majority gate
• Design of a spin-wave majority gate employing mode selection
• Sign of inverse spin Hall voltages generated by ferromagnetic resonance and temperature gradients in yttrium iron garnet|platinum bilayers
• Excitation and detection of short-waved spin waves in ultrathin Ta/CoFeB/MgO-layer system suitable for spin-orbit-torque magnonics

Cited by in corpus (3)

• Stabilization of a nonlinear bullet coexisting with a Bose-Einstein condensate in a rapidly cooled magnonic system driven by a spin-orbit torque
• Realization of a spin wave switch based on the Spin-Transfer-Torque effect
• Spin transport and magnetic proximity effect in CoFeB/normal metal/Pt trilayers