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Subnanosecond magnetization dynamics driven by strain waves

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Abstract

The magnetic properties of a magnetic material can be modified by elastic deformation—termed the magnetoelastic effect. This effect is considered an alternative approach to magnetic fields for the low-power control of magnetization states of nanostructures since it avoids charge currents that create heat dissipation. This article describes the effects of dynamic strain accompanying a surface acoustic wave on magnetic nano-elements. We use a technique based on stroboscopic x-ray microscopy to simultaneously image the evolution of both strain and magnetization at the nanometer length and picosecond time scales. The study shows that there is a delayed response of the magnetization to dynamic strain, adjustable by the magnetic properties of the material. The presented analysis provides insights into dynamic magnetoelastic coupling in nanostructures with implications for the design of strain-controlled nanodevices.

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Acknowledgments

The project was supported by the ALBA in-house research program through IH2015PEEM and the allocation of in-house beamtime as well as with proposal 2016021647. F.M. acknowledges support from the RyC through Grant No. RYC-2014-16515 and from MINE-CO through the SO Program (Grant Nos. SEV-2015-0496 and MAT2017-85232-R). Funding through MAT2015–69144-P (J.M.H. and F.M.), MAT2015-64110-C2-2-P (L.A. and M.F.) (MINECO/FEDER-UE) is acknowledged.

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Authors and Affiliations

  1. ALBA Synchrotron, Spain

    Michael Foerster & Lucia Aballe

  2. Department of Condensed Matter Physics, University of Barcelona, Spain

    Joan Manel Hernàndez

  3. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Spain

    Ferran Macià

Authors
  1. Michael Foerster
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  2. Lucia Aballe
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  3. Joan Manel Hernàndez
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  4. Ferran Macià
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Correspondence to Michael Foerster.

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Foerster, M., Aballe, L., Hernàndez, J.M. et al. Subnanosecond magnetization dynamics driven by strain waves. MRS Bulletin 43, 854–859 (2018). https://doi.org/10.1557/mrs.2018.258

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