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Related Experiment Video

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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Published on: January 19, 2018

Current-induced spin-wave Doppler shift.

Vincent Vlaminck¹, Matthieu Bailleul

¹Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 CNRS-Université Louis Pasteur, 23 Rue du Loess, 67034 Strasbourg Cedex 2, France.

Science (New York, N.Y.)

|October 18, 2008

Summary

Spin transfer torque in permalloy strips was measured using spin waves. This method accurately probes spin-polarized transport in magnetic materials.

Area of Science:

Spintronics
Condensed Matter Physics
Materials Science

Background:

Spin transfer is crucial for advancing spintronics devices.
Quantitative measurements of spin transfer are needed for a deeper understanding.

Purpose of the Study:

To quantitatively measure spin transfer magnitude.
To explore spin waves as a probe for spin-polarized transport.

Main Methods:

Inductive measurement of spin waves in a permalloy strip.
Application of a large electrical current to the strip.
Observation of current-induced spin wave Doppler shift.

Main Results:

A current-induced spin wave Doppler shift was observed.

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This shift is linked to adiabatic spin transfer torque.

Conclusions:

Spin waves offer a well-defined system for studying spin transfer.
Spin waves can serve as an accurate probe for spin-polarized transport in itinerant ferromagnets.