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

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-wav...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Meyer, T, Brächer, T, Heussner, F, Serga, A A, Naganuma, H, Mukaiyama, K, Oogane, M, Ando, Y, Hillebrands, B, Pirro, P
Format: Article
Language:English
Subjects:
Current pulses
Damping
Density
Hall effect
Magnetization
Magnons
Spin dynamics
Threshold currents
Torque
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1711.09647