Magnetization process of a ferromagnetic nanostrip under the influence of a surface acoustic wave.

Scientific Reports
David CastillaJosé L Prieto

Abstract

Surface Acoustic Waves (SAW) are one of the possible solutions to target the challenges faced by modern spintronic devices. The stress carried by the SAW can decrease the current required to achieve magnetic switching or domain wall movement by spin transfer torque. Although the last decade has produced very relevant results in this field, it is still important to study the effects of a SAW on the basic unit of many spintronic devices, a ferromagnetic nanostrip. In this work, we perform a complete set of measurements and simulations to characterize the magnetization process of a Ni nanostrip under the influence of a SAW. We find that the SAW increases the mobility and the depinning ability of the magnetic domain walls and consequently, promotes a sharper approach to saturation and substantially decreases coercivity. We have also found other two interesting effects. When the SAW has sufficient energy, is able to trigger irreversible transitions even before switching the direction of the external magnetic field. Additionally, we have found that the magnetization process depends on the direction of the travelling SAW.

References

Apr 8, 2011·Physical Review Letters·M WeilerS T B Goennenwein
Jun 12, 2012·Physical Review Letters·M WeilerS T B Goennenwein
Mar 7, 2014·Nanotechnology·S BüyükköseP V Santos
Sep 3, 2017·Nature Communications·Michael FoersterLucia Aballe
Jun 16, 2019·Nature Communications·Cassidy BerkHolger Schmidt

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Citations

May 20, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A AdhikariS Adenwalla

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Methods Mentioned

BETA
X-Ray

Software Mentioned

MuMax

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